Eczema, also referred to as atopic eczema or atopic dermatitis, is an itchy inflammatory skin disease most commonly
seen in children. It is characterised by pruritis and inflamed, dry, scaling and crusted skin in the acute phase (Figure
1) with lichenification (thickening) and hyperpigmentation of the skin if the condition becomes chronic. Children with
eczema will usually experience recurrent flares.
Eczema has been reported to affect approximately 20% of children in New Zealand with disproportionally higher rates
among Māori and Pacific children.1 Over 90% of cases of eczema develop in children before the age of five
years and 60% of these cases occur in the first year of life.2 Although many children experience remission
as they grow older, approximately 20 – 40% of those affected in childhood will continue to experience eczema as adults.1
The pathogenesis of eczema is complex and it is now thought that skin barrier dysfunction, environmental factors, a
genetic predisposition and immune dysfunction all contribute to its development and are closely intertwined.3 The
traditional view, that eczema was primarily an immune-mediated response, has been challenged by recent research that suggests
abnormalities in the skin barrier, including mutations in filaggrin (a structural protein), play a major role in the development
of eczema.4, 5
The severity of the child’s symptoms should guide treatment
The diagnosis of eczema in children is usually based on the patient history and clinical signs, e.g. dry, itchy skin
and an early age of onset.2 After a diagnosis of eczema has been made, treatment is tailored to the severity
of the child’s symptoms (Table 1).
Table 1: Eczema management algorithm (adapted from NICE, 2007)6, 7
ECZEMA SEVERITY CHARACTERISTICS |
Controlled eczema with no active skin involvement |
Mild eczema |
Moderate eczema |
Severe eczema |
Normal skin with no evidence of dryness, redness or itching |
Areas of dry skin
Infrequent itching (with or without small areas of redness) |
Areas of dry skin
Frequent itching
Redness (with or without excoriation and localised skin thickening) |
Widespread areas of dry skin
Incessant itching
Redness (with or without excoriation, extensive skin thickening, bleeding, oozing, cracking and alteration of skin
pigment) |
TREATMENT |
Controlled eczema with no active skin involvement |
Mild eczema |
Moderate eczema |
Severe eczema |
All: Emollients + parent or caregiver education including advice regarding adherence |
|
Mild topical corticosteroids, e.g. hydrocortisone 1% |
Moderate topical corticosteroids,* e.g. triamcinolone acetonide, clobetasone butyrate† |
Potent topical corticosteroids,‡ e.g. hydrocortisone butyrate 0.1%,** betamethasone valerate (over age one year),
mometasone furoate, methylprednisolone aceponate |
|
|
|
Consider referral for systemic and additional treatments |
* Avoid use on face, neck, genitals or axillae for longer than seven to 14 days
† Clobetasol butyrate (Eumovate – partly subsidised) is a moderate potency corticosteroid and should not be confused with
clobetasol propionate (Dermol) which is a very potent corticosteroid
‡ Avoid use on face, neck, genitals or axillae
** Hydrocortisone butyrate 0.1% (Locoid) is a potent corticosteroid and should not be confused with hydrocortisone 1%, a mild corticosteroid
Provide comprehensive education and support to the child’s parents/caregivers
Providing educational materials about eczema to parents or caregivers can help to increase their knowledge about their
child’s condition, and therefore reinforce effective management and help to promote adherence to topical treatments. Practice
nurses are often responsible for this education and ongoing support.
A leaflet for parents on how to care for the child’s eczema is available from:
www.starship.org.nz/media/269759/caring_for_your_child_s_eczema_june_2014.pdf
Recommend daily baths using wash-off emollients
Warm (not hot) baths, once daily, lasting no longer than 10 – 15 minutes are recommended for all children with eczema.8 Emollients
or wash-off emollient products, rather than soaps or detergents, should be used when bathing, and bubble baths avoided.
Aqueous cream BP and emulsifying ointment BP (both subsidised) can be used as soap substitutes during bathing.* These
products can also be used as wash-off emollients if the household does not have a bath, applied before the child enters
the shower and then washed off.
* Neither aqueous cream BP nor emulsifying ointment BP should be used as a leave-on emollient as both
contain sodium lauryl sulphate and can irritate the skin (see: “Which emollient should be prescribed”).
A video on bathing children with eczema is available from:
www.kidshealth.org.nz/eczema-care-bathing
Twice-weekly bleach baths are also recommended
Twice-weekly antiseptic baths with diluted sodium hypochlorite (household bleach) can reduce staphylococcal carriage
and improve the child’s symptoms.9 Parents can be advised to add 2 mL of plain bleach (2.2% sodium hypochlorite,
e.g. “Budget Household Bleach Regular”) per litre of bathwater and bathe the child for 10 – 15 minutes, twice a week.
A full-sized bath with a 10 cm depth of water holds approximately 80 litres of water, and will therefore require approximately
160 mL of 2.2% bleach. A baby’s bath holds approximately 15 litres of water and will require approximately 30 mL of 2.2%
bleach. Parents should be advised that bleach baths are safe when the correct amount of bleach is added to the bath, but
to avoid contact between the bath water and the child’s eyes. Antiseptic bath oils, e.g. Oilatum Plus or QV Flare up,
can be used instead of bleach, but are generally more expensive.
After bathing, the child should be rinsed off with fresh water and patted dry with a towel, followed by application
of emollients and topical corticosteroids.
A patient leaflet that provides detailed information on how to prepare a bleach
bath is available from:
www.starship.org.nz/media/269481/bleach_bath_handout.pdf
Recent evidence has highlighted the effectiveness of bleach baths in children with eczema, including an improvement
in symptoms and reductions in Staphylococcus aureus colonisation. A recent study randomised 42 patients aged
two to 30 years with moderate-to-severe eczema to either twice-weekly bleach baths (for ten minutes at a time) or normal
baths, for two months. Patients in the bleach bath group had significant reductions in the Eczema Area and Severity Index
(EASI)* scores at both one and two months.9 Reductions in S. aureus density were
also observed at one and two months.9 Mild adverse events (burning/stinging) were observed in both treatment
groups.9 A recently completed, but as yet unpublished, small randomised controlled trial in New Zealand found
improvements in both the EASI and Scoring Atopic Dermatitis (SCORAD) scores in children with atopic eczema who had dilute
bleach added to their bath. Children who did not have bleach added to their bath had very little change in their EASI
and SCORAD scores.10
* The EASI score is a tool used mainly in a research setting to measure the extent and severity of a patient’s
eczema.
Advise about avoiding triggers/irritants
Avoiding triggers and irritants is beneficial during acute eczema flares as well as for long-term management to avoid
the “itch-scratch-itch” cycle. Factors that can exacerbate a child’s eczema include soaps, detergents, chemicals, abrasive
clothing and temperature extremes.11
Useful advice that can be given to parents includes:11
- Wash new clothes before use to avoid contact with formaldehyde and other chemicals from the manufacturing process
that can irritate the skin
- Use mild detergents labelled for sensitive skin when washing clothes and do a second rinse cycle to remove residual
detergent. Avoid the use of fabric softeners.
- Dress children in loose cotton clothing and avoid wool or synthetics next to the skin, i.e. use cotton fabrics as
a base layer
- Avoid topical products that contain fragrances, alcohol and other ingredients that can dry the skin, e.g. witch hazel
- Encourage children to rinse in fresh water after swimming in a chlorinated pool and follow with application of an
emollient
- Keep children’s fingernails trimmed to avoid injury from scratching
Although the influence of airborne allergens, e.g. dust mites, in exacerbating eczema is unclear, some parents may wish
to reduce this exposure. This can be achieved by encasing the child’s mattress, base and pillows in allergen-barrier bedding
covers and washing top bedding in hot water (>55°C), or hot ironing, every two weeks.12
The role of food allergy in eczema is unclear
The role of food allergens in the aetiology of a child’s eczema is frequently overestimated, particularly by parents.13 Food
allergy is more likely to be a contributing factor in young infants with severe generalised eczema.12
Parents should be advised against putting their child on a very restrictive diet as this is often of limited benefit,
and the diet can be expensive to maintain and result in nutritional deficiencies.12, 14
Allergy screening with large panels of food allergens is not recommended in children with eczema, as the child is usually
atopic and allergy test results can reflect sensitisation to food rather than a clinically relevant allergy.12,
13 Investigation of potential food allergies in children with eczema is recommended under the following circumstances:12
If there is a history of an immediate allergic reaction following food consumption (this can also occur in a breast
fed infant due to maternal ingestion of an allergen)
If a young child has severe, problematic eczema and is unresponsive to appropriate topical treatment
If food allergy is suspected in a child with eczema, discussion with an immunologist, paediatric dermatologist or paediatrician
is recommended, to decide on a course of further investigation, which may include radioallergosorbent test (RAST) or skin
prick testing.12 These tests can be performed in primary care, but results can sometimes be misleading or
difficult to interpret.
For further information, see: “Appropriate
use of allergy testing in primary care” (Best Tests, Dec 2011).
Use emollients frequently and in large quantities
Emollients form the basis of treatment for all children with eczema, as they reduce inflammation and support the natural
skin barrier. Increased use of emollients has been shown to improve both the child’s and parent’s quality of life, reduce
the child’s eczema symptoms and sleep disturbances and decrease the amount of topical corticosteroids required.15,
16
Ideally, emollients should be applied several times a day to the entire body and continued even when the
child’s eczema has cleared.8 Children should be prescribed 250 – 500 g of emollient per week to
provide sufficient product for moisturising, washing and bathing.8
Where possible emollients should be dispensed in a pump container or tube, as emollients prescribed in tubs or jars
can become contaminated.8 If tubs or jars are dispensed, advise carers to scoop the emollient from the tub
using a clean spoon or spatula to avoid bacterial contamination.
Children should be encouraged to apply their emollients themselves from a young age, as this helps adherence and self-treatment
when they start attending school. School-aged children should ideally keep a supply of emollient at school and be encouraged
to use it whenever they feel the urge to scratch.
Best practice tip: when prescribing an emollient it is useful to put the monthly quantity of emollient
required on prescription (i.e. 2000 g per month). As most subsidised emollients are “stat” dispensed, the pharmacist is
generally obliged to give the entire three months supply at the same time. However, if the prescriber wishes to limit
the initial supply this can be achieved by endorsing the prescription with “trial period one month”.
Which emollient should be prescribed?
The best choice of emollient is the one preferred by the child/parent as it is more likely to be used regularly. Emollients
have different formulations, including ointments, creams and lotions. The difference is the proportion of oil (lipid)
to water in the product. The lipid content is highest in ointments, intermediate in creams and lowest in lotions. As a
general rule, the products with the highest lipid content are more effective in treating dry skin, provide better barrier
protection and have a longer duration of action,12 but may be the least convenient due to being the most
greasy/sticky on the skin.
The current subsidised emollients include three products that contain cetomacrogol derivatives and are considered as
slightly-to-moderately greasy creams. These are Fatty Cream (HealthE) and cetomacrogol cream (PSM) which are available
in 500 g tubs, and Sorbolene cream (which contains cetomacrogol + 10% glycerol) which is available in 500 g and 1 kg pump
dispensers. Other products are available to purchase if the child or parent prefers another formulation. Aqueous cream
BP and emulsifying ointment BP should not be used as leave-on emollients.
Further information on emollients including subsidy restrictions is available from:
www.nzfchildren.org.nz/nzf_6237?searchterm=emollients
Practical tips on emollient use
Some useful advice for parents includes:8
- Emollients should be smoothed (not rubbed) onto the child’s skin in the direction of hair growth to avoid irritation
- Products in tubs/jars should be discarded after the child has had a skin infection as they may have become contaminated
- Emollients should be continued when topical corticosteroids are being used and can be applied before or after the
topical corticosteroid
A patient video on the use of emollients is available from:
www.kidshealth.org.nz/eczema-care-moisturisers
Use sufficient amounts of topical corticosteroids once or twice daily for the treatment of flares
Flares are characteristic of eczema, despite efforts to avoid irritants and apply emollients frequently. Topical corticosteroids
are effective for treating flares, and, when used correctly, result in minimal adverse effects.17 As with
emollients, underuse of topical corticosteroids is more common than overuse, and discussing the benefits and risks of
topical corticosteroid treatment with the family can assist in overcoming “corticosteroid phobia” (see: “Overcoming
corticosteroid phobia”).
A patient video on use of topical corticosteroids is available from:
www.kidshealth.org.nz/eczema-care-steroids
The potency of the corticosteroid prescribed should be matched to the severity of the child’s eczema flare (Table 1)
and the area of the body affected. It is important that the child’s parents are aware of what area of the body the topical
corticosteroid should be applied to, particularly if more than one topical corticosteroid has been prescribed, e.g. hydrocortisone
for the face and a more potent corticosteroid for eczema on the body.
Best Practice Tip: Note on the prescription the specific area
to which the cream needs to be applied, as this will then be put on the dispensing label by the pharmacy.
Are there any general rules to follow when selecting the appropriate potency?
The potency of the topical corticosteroid should match the severity of the child’s symptoms. However, some useful rules
of thumb to guide treatment include:
- Low potency corticosteroids (e.g. hydrocortisone cream 1%) should be used as first-line treatment in children of all
ages with facial or flexural eczema.11
- Moderate potency topical corticosteroids (e.g. triamcinolone acetonide) can be considered as a second-line, short-term
(five to seven days) treatment for use on the face in severe cases.11
- Infants aged less than one year with eczema on the trunk, legs or arms can usually be managed with a low potency corticosteroid.
Pre-school aged children generally require a moderate or potent topical corticosteroid and school-aged children often
require a potent topical corticosteroid.11
- Potent corticosteroids (e.g. hydrocortisone butyrate 0.1%) should not be prescribed for children aged less than one
year and very potent topical corticosteroids, e.g. clobetasol propionate (Dermol), should not be prescribed for children
with eczema at any age, without first discussing with a dermatologist.11
- In general, short bursts of more potent topical corticosteroids are more effective and have fewer adverse effects
than longer term use of lower potency topical corticosteroids
- Mixing a topical corticosteroid with an emollient or another product does not reduce the potency of the topical corticosteroid8
For further information on the topical corticosteroids, see:
www.nzfchildren.org.nz/nzf_6272
How often should topical corticosteroids be applied, and for how long?
Topical corticosteroids should be applied no more than twice a day.8 Once daily application is sufficient
in most cases (preferably after a bath), as applying treatment more frequently has not been shown to result in significantly
better results and may adversely affect patient adherence.17, 18
Topical corticosteroids should only be applied to areas of active eczema (including broken skin) and usually discontinued
when the flare has resolved (see: “Weekend treatment”).8 The treatment duration is
usually less than two weeks and if the flare does not resolve in this time then the treatment should be reassessed (see
below).
What to consider when treatment is not working
If there is no improvement in the child’s symptoms after seven to 14 days of treatment, or if topical corticosteroids
are required most days, then consider the following:8
- Poor adherence to treatment, including missed applications or use of an inadequate amount
- The corticosteroid is not potent enough
- Ongoing exposure to irritants, e.g. soap, sodium lauryl sulphate, or a contact allergen
- Secondary bacterial or viral skin infection
- Incorrect initial diagnosis
How much topical corticosteroid should be prescribed?
An adult fingertip unit (FTU) should be used as a guide when prescribing topical corticosteroids and when
advising parents about appropriate use (Tables 3 and 4). One FTU is the amount
of product (approximately 3 cm or 0.5 g) that will cover an adult index finger, from the tip of the finger to the distal
interphalangeal joint, from a tube that has a standard 5 mm nozzle (Figure 2).19 As a general guide, one
adult FTU is enough to treat an area of the child’s eczema equal to the surface of two adult hands held side by side with
the fingers together.
Figure 2: Fingertip unit (Image provided by Dermnet NZ)
Table 3: Approximate number of adult finger tip units (FTU) of corticosteroid needed per application for
children with eczema.11, 20
|
6 months old |
12 months old |
5 years old |
10 years old |
One entire arm and hand |
1 |
1.5 |
2 |
2.5 |
One entire leg and foot |
1.5 |
2 |
3 |
4.5 |
Torso (front) |
1.5 |
2 |
3 |
3.5 |
Back and buttocks |
1.5 |
3 |
3.5 |
5 |
Table 4: Approximate weight of product required for a once-daily application of corticosteroid to cover
the entire body.11
|
6 months old |
12 months old |
5 years old |
10 years old |
Daily (g) |
5 |
6 |
10 |
15 |
Weekly (g) |
35 |
40 |
70 |
100 |
Topical corticosteroids can be used as maintenance treatment in children with frequent flares
In most cases, once control of the flare has been achieved, topical corticosteroid treatment can be stopped and emollients
continued. However, some children experience frequent flares (two or three per month) and in these cases it may be useful
to continue topical corticosteroid treatment between flares.21 There are two ways to do this – either step
down to the lowest potency product that controls symptoms or use the same potency product less frequently, i.e. “weekend
treatment”.21
Weekend treatment can be used to prevent recurrence once control of the initial flare
with a topical corticosteroid has been achieved. The topical corticosteroid should be applied once-daily on two consecutive
days per week (not necessarily over the weekend, although this is often more convenient).21 Emollients should
be continued every day, including when the corticosteroid is not being applied. This strategy should be reviewed within
three to six months to assess effectiveness.6
A study that investigated the efficacy of long-term, weekend topical corticosteroid treatment (up to 16 weeks) showed
that this treatment reduced the extent and severity of symptoms and reduced the risk of recurrence in children aged four
to ten years with a history of severe recurrent eczema.22
Overcoming corticosteroid “phobia”: appropriate use does not result in skin atrophy
Parents often underutilise topical corticosteroids due to the fear of adverse effects. Skin thinning is commonly cited
as the most concerning adverse effect.23 However, recent evidence suggests this adverse effect has been over-stated.17,
23
A 2011 study that investigated the atrophogenic potential of topical corticosteroids in 92 paediatric dermatological
patients reported that it was possible to obtain excellent control of symptoms without producing cutaneous atrophy.23 The
children had all received long-term (at least three months) topical corticosteroid treatment.23 No degree
of cutaneous atrophy was observed using a validated five-point dermoscopic scale at any of the 280 body sites measured,
even though the children had received treatment for a prolonged period.23
An Australasian consensus statement on the adverse effects of topical corticosteroids in paediatric eczema agreed with
these findings.17 The statement reported that what is commonly referred to as skin thinning by parents and
non-dermatologists is usually a misinterpretation of active eczema.17 Other findings from the consensus statement
about the use of topical corticosteroids include:17
- The fingertip unit should be used as a guide for the amount of corticosteroid to be applied
- Irreversible skin thinning does not occur when topical corticosteroids are used to treat flares and then terminated
upon resolution of the flare
- Topical corticosteroids do not result in striae unless used inappropriately, e.g. under occlusion for long periods,
or in overdose, and only then at certain body sites, e.g. groin or axillae
- Clinically significant adrenal suppression is very rare with appropriate use
- The hyper- or hypo-pigmentation observed as the child’s eczema clears is caused by the eczema and not the topical
corticosteroid
Explaining to parents that topical corticosteroids have an anti-inflammatory effect, and are different to anabolic steroids,
can also assist in overcoming any steroid phobia the parents may have.
Use other pharmacological options as required
Emollients and topical corticosteroids are the evidence-based core treatments for children with eczema, however, other
treatment options may be considered in certain circumstances.
Pimecrolimus can be used as a second-line treatment when topical corticosteroids are contraindicated
Pimecrolimus cream 1% (unsubsidised) is a calcineurin inhibitor that can be used as a second-line treatment for sensitive
areas of eczema, e.g. the head, neck and genital area, in children aged three months or older when topical corticosteroids
are unable to be used or have been ineffective despite optimal use.7, 8 Treatment should only be applied
for short periods – up to three weeks at a time in children aged less than two years and for up to six weeks in children
aged two to 18 years.7
Pimecrolimus has been shown to be less effective than moderate and potent corticosteroids and has not been compared
directly with low potency corticosteroids.24 A 2011 meta-analysis and systematic review reported that topical
corticosteroids appeared to be more effective than calcineurin inhibitors for the prevention of flares in people with
atopic eczema.25
The benefits and risks of treatments should be discussed with parents as pimecrolimus can cause local irritation, most
commonly a short-lasting burning sensation.7 Other adverse effects include irritation, pruritis and erythema
at the application site and also skin infections (most commonly folliculitis).7
Antibiotics are required for secondary infection
Children with infected eczema require treatment with an oral antibiotic. The antibiotic regimen should be selected based
on local resistance patterns and be active against S. aureus and streptococci. Skin swabs can be considered
in certain circumstances, e.g. in areas with high prevalence rates of methicillin-resistant S. aureus (MRSA)
or in children who have failed to respond to the first-line antibiotic treatment.
A first-line recommended treatment regimen is:26
- Flucloxacillin 12.5 mg/kg, three times daily, for seven to ten days (maximum 500 mg/dose)
OR
- Cephalexin 12.5 – 25 mg/kg , twice daily, for seven to ten days (maximum 500 mg/dose)
Erythromycin 10 mg/kg/dose, four times daily or 20 mg/kg, twice daily is a second-line alternative.26
Flucloxacillin syrup can be unpalatable for some children, therefore those who can swallow capsules should be prescribed
these in preference to the syrup. It is not recommended that the syrup is mixed with other liquids prior to administration
to help improve the taste, but a sweet drink can be given afterwards. As cephalexin is a broader spectrum antibiotic than
flucloxacillin, ideally it should be chosen second-line, however, if compliance with flucloxacillin will be problematic,
it is a recommended option.
Prescribing topical antibiotics, e.g. fusidic acid, for children with small localised lesions of infected eczema is
now generally not recommended due to the high rates of resistance to fusidic acid in the community. Combination steroid,
antibiotic and antifungal creams, e.g. Pimafucort (subsidised), may be appropriate for localised infections in certain
circumstances, e.g. children with angular chelitis.
A patient handout on infected eczema is available from:
www.starship.org.nz/media/269484/infected_eczema_handout.pdf
Antihistamines: may aid sleep in children with severe itch
Antihistamines are not routinely recommended for treating children with eczema as they do not generally help with the
itch.8 However, a short (< one month) trial of a non-sedating antihistamine, e.g. cetirizine, can be considered
in children with moderate-to-severe eczema or when there is associated urticaria.8 Non-sedating antihistamines
are generally not recommended for use in children aged less than two years, with the exception of cetirizine which can
be prescribed to children aged one year or older.7
During an eczema flare, itch can become severe and a short course of a sedating antihistamine, e.g. promethazine hydrochloride,
can be trialled to aid sleep in children aged over two years.8 The sedating antihistamine should initially
be used at night when the child cannot sleep due to the itch and reduced to “as necessary” when the child’s symptoms have
improved. Sedating antihistamines are contraindicated in children aged less than two years for all indications.7
Best practice tip: If a child is being prescribed a sedating antihistamine “as required”, ensure that an
appropriate volume of medicine is indicated on the prescription.
Wet wraps: usually now initiated in secondary care
In the past, wet wraps have been recommended to parents as an at-home treatment for children with severe or extensive
eczema. However, they are now generally not recommended for use in an outpatient community setting as the benefits of
wet wraps over appropriate use of topical corticosteroids has not be proven.8, 27 Wet wraps have a number
of drawbacks including systemic absorption of corticosteroids, high cost, necessity for specialised training to apply
the wraps effectively and safely, and an increase in cutaneous infections and folliculitis.12 They are sometimes
used in a hospital setting under specialist supervision and require close monitoring if used with topical corticosteroids.
Oral corticosteroids are generally not recommended
Oral corticosteroids (e.g. prednisolone) are not generally recommended for treating children with eczema as there can
be significant rebound flaring of eczema when they are withdrawn.8
Acknowledgement
Thank you to Dr Diana Purvis, Paediatric Dermatologist, Starship Children’s Health,
Honorary Senior Lecturer, School of Medicine, University of Auckland for expert review of this article.