Eczema: How To Prevent And Cure

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Atopic eczema is an inflammation of the skin, which tends to flare up from time to time. It usually starts in early childhood. The severity can range from mild to severe. There is no cure but treatment can usually control or ease symptoms. Moisturisers (emollients) and steroid creams or ointments are the common treatments. About 2 in 3 children with atopic eczema grow out of it by their mid-teens.
What is atopic eczema?

Eczema is sometimes called dermatitis which means inflammation of the skin. There are different types of eczema. The most common type is atopic eczema. In this type of eczema there is a typical pattern of skin inflammation which causes the symptoms.

The word atopic describes people with certain allergic tendencies. However, atopic eczema is not just a simple allergic condition. People with atopic eczema have a chance of developing other atopic conditions, such as asthma and hay fever.

What Are The Symptoms Of Atopic Eczema?

•     The skin usually feels dry.
•     Some areas of the skin become red and inflamed. The most common areas affected are next to skin creases, such as the front of the elbows and wrists, backs of knees and around the neck. However, any areas of skin may be affected. The face is commonly affected in babies with atopic eczema.
•     Inflamed skin is itchy. If you scratch a lot it may cause patches of skin to become thickened.
•     Sometimes the inflamed areas of skin become blistered and weepy.
•     Sometimes inflamed areas of skin become infected.

Typically, inflamed areas of skin tend to flare up from time to time and then tend to settle down. The severity and duration of flare-ups varies from person to person and from time to time in the same person.

    In mild cases, a flare-up may cause just one or two small, mild patches of inflammation. Often these are behind the knees, or in front of elbows or wrists. Flare-ups may occur only now and then.
    In severe cases, the flare-ups can last several weeks or more and cover many areas of skin. This can cause great distress.
    Many people with atopic eczema are somewhere in between these extremes.
Who has atopic eczema?

Most cases first develop in children under the age of five years. It is unusual to develop atopic eczema for the first time after the age of 20. At the moment, about 1 in 5 schoolchildren have some degree of atopic eczema. However, statistics show that it is becoming more common year on year. In about 2 in 3 cases, by the mid-teenage years, the flare-ups of eczema have either gone completely, or are much less of a problem. However, there is no way of predicting which children will still be affected as adults.

Between 1-5 in 20 adults have atopic eczema.

What Causes Atopic Eczema?

The cause is not known. The oily (lipid) barrier of the skin tends to be reduced in people with atopic eczema. This leads to an increase in water loss and a tendency towards dry skin. Also, some cells of the immune system release chemicals under the skin surface, which can cause some inflammation. But it is not known why these things occur. Inherited (genetic) factors play a part. Atopic eczema occurs in about 8 in 10 children where both parents have the condition and in about 6 in 10 children where one parent has the condition. The precise genetic cause is not clear (which genes are responsible, what effects they have on the skin, etc). However, recent research suggests that in some people genetic changes hamper the production of a chemical (filaggrin) involved in the defence barrier of the skin.

As mentioned previously, atopic eczema is becoming more common. There is no proven single cause for this but factors which may play a part include:

•     Changes in climate.
•     Pollution.
•     Allergies to house dust mite or pollens.
•     Diet.
•     Infections.
•     Other early-life factors.

There may be a combination of factors in someone who is genetically prone to eczema, which causes the drying effect of the skin and the immune system to react and cause inflammation in the skin.
What is the usual treatment for atopic eczema?

The usual treatment consists of three parts:

    Avoiding irritants to the skin and other causes (triggers) wherever possible.
    Moisturisers (emollients) - used every day to help prevent inflammation developing.
    Steroid creams and ointments (topical steroids) - mainly used when inflammation flares up.

Treatment Part 1 - Avoid irritants and triggers where possible

Many people with atopic eczema have flare-ups from time to time for no apparent reason. However, some flare-ups may be caused (triggered) or made worse by irritants to the skin, or by other factors. It is commonly advised to:

•     Avoid soaps, bubble baths, etc, when you wash. They can dry out the skin and make it more prone to irritation. Instead, use a soap substitute plus a bath/shower moisturiser (emollient) - see below.
•     Biological washing powders and fabric conditioners can also sometimes cause problems.
•     Try as much as possible not to scratch. To help with this, keep nails short and use anti-scratch mittens in babies. If you need to relieve an itch, rub with fingers rather than scratch with nails.
•     Wear cotton clothes next to skin rather than irritating fabrics such as wool. However, it is probably the smoothness of the material rather than the type of the material which helps. Some smooth man-made fabrics are probably just as good as cotton.
•     Avoid getting too hot or too cold as extremes of temperature can irritate the skin.
•     After you wash clothes with detergent, rinse them well. Some biological detergents are said by some people to be irritating. But there is little proof that commonly used detergents that are used in the normal way make atopic eczema worse.

 House Dust Mite May Be A Trigger In Some Cases
 House dust mite is a tiny insect that occurs in every home. You cannot see it without a microscope. It mainly lives in bedrooms and mattresses as part of the dust. Many people with atopic eczema are allergic to house dust mite. If you are allergic, you have to greatly reduce the numbers of house dust mite for any chance that symptoms may improve.

However, it is impossible to clear house dust mite completely from a home and it is hard work to reduce their number to a level which may be of benefit. It involves regular cleaning and vacuuming with particular attention to your bedroom, mattress and bedclothes.

Therefore, in general, it is not usually advised to do anything about house dust mite - especially if your eczema is mild-to-moderate and can be managed by the usual treatments of emollients and short courses of topical steroids. However, if you have moderate or severe atopic eczema which is difficult to control with the usual treatments, you may wish to consider reducing the number of house dust mites in your home. See separate leaflet called House Dust Mite and Pet Allergy, which gives more details on how to reduce house dust mites.
About 1 in 2 children with atopic eczema have a food allergy which can make symptoms worse. In general, it is young children with severe eczema who may have a food sensitivity as a trigger factor. The most common foods which trigger symptoms in some people include cow's milk, eggs, soya, wheat, fish and nuts.

If you suspect a food is making your child's symptoms worse then see a doctor. You may be asked to keep a diary over 4-6 weeks. The diary aims to record any symptoms and all foods and drink taken. It may help to identify one or more suspect foods. If food allergy is suspected, it should be confirmed by a specialist. They may recommend a diet without this food if the eczema is severe and difficult to control by other means.
Other triggers

Other possible factors which may trigger symptoms, or make symptoms worse, include:

•     Stress and habit scratching.
•     Pollens, moulds, and dander from pets.
•     Pregnancy and hormonal changes before a period in women.

However, some of these may not be avoidable.


Treatment Part 2 - Moisturisers (emollients)

People with atopic eczema have a tendency for their skin to become dry. Dry skin tends to flare up and become inflamed into patches of eczema. Emollients are lotions, creams, ointments and bath/shower additives which prevent the skin from becoming dry. They oil the skin, keep it supple and moist and help to protect the skin from irritants. This helps to prevent itch and helps to prevent or to reduce the number of eczema flare-ups.

The regular use of emollients is the most important part of the day-to-day treatment for atopic eczema. Your doctor, nurse or pharmacist can advise on the various types and brands available and the ones which may suit you best.

You should apply emollients as often as needed. This may be twice a day, or several times a day if your skin becomes very dry. Some points about emollients include:

•     As a rule, thicker, greasy ointments work better and for longer than thinner creams but they are messier to use. Some people don't mind using thick ointments; however, some people prefer creams (but apply them more often).
•     Apply liberally to all areas of skin. You cannot overdose or overuse emollients. They are not active medicines and do not get absorbed through the skin.
•     Apply emollients in the general direction of hair growth. If applied in the opposite direction the base of the hair shafts can get blocked, leading to possible infection.
•     Use emollients every day. A common mistake is to stop using emollients when the skin appears good. Patches of inflammation, which may have been prevented, may then quickly flare up again.
•     Various emollient preparations come as bath additives and shower gels. These may be considered in people with extensive areas of dry skin. However, there is some debate as to how well these work. If you do use them, they should be used in addition to, not instead of, creams, ointments or lotions that you rub on to the skin.
•     Pump dispensers are better than pots because they are less likely to harbour germs. If you need to use a pot, use a clean spoon or spatula to get the contents out, rather than your fingers.

Many people with atopic eczema use a range of different emollients. For example, a typical routine for a person with moderately severe atopic eczema might be:

•     When you have a bath or shower, consider adding an emollient oil to the bath water or as you shower. This will give your skin a general background oiling.
•     Use a thick emollient ointment as a soap substitute for cleaning. You can also rub this into particularly dry areas of skin.
•     After a bath or shower it is best to dry by patting with a towel rather than by rubbing. Then apply an emollient cream or ointment to any remaining dry areas of skin.
•     Between baths or showers, use an emollient cream, ointment or lotion as often as necessary.
•     A dry dressing may be helpful if your eczema is more severe, as this helps to keep the emollient from being rubbed off the skin and stops scratching. However, you should not use a dressing if infection is present.
•     Use an emollient ointment at bedtime.

Note: emollients used for eczema tend to be bland and non-perfumed. Occasionally, some people become allergic (sensitised) to an ingredient in an emollient. This can make the skin worse rather than better. If you suspect this, see your doctor for advice. There are many different types of emollients with various ingredients. A switch to a different type will usually sort out this uncommon problem.

Warning: bath additive emollients will coat the bath and make it greasy and slippery. It is best to use a mat and/or grab rails to reduce the risk of slipping. Warn anybody else who may use the bath that it will be slippery.

How Do I Apply Topical Steroids?
Topical steroids are usually applied once a day but this may be increased to twice a day if there is no improvement. Rub a small amount thinly and evenly just on to areas of skin which are inflamed. (This is different to moisturisers (emollients) which should be applied liberally all over.)

To work out how much you should use each dose: squeeze out some cream or ointment from the tube on to the end of an adult finger - from the tip of the finger to the first crease. This is called a fingertip unit. One fingertip unit is enough to treat an area of skin twice the size of the flat of an adult's hand with the fingers together. Gently rub the cream or ointment into the skin until it has disappeared. Then wash your hands (unless your hands are the treated area).

Note: don't forget you can use emollients as well when you are using a course of topical steroids.
What about side-effects of topical steroids?

Short courses of topical steroids (fewer than four weeks) are usually safe and normally cause no problems. Problems may develop if topical steroids are used for long periods, or if short courses of strong topical steroids are repeated often. The concern is mainly if strong topical steroids are used in the long term. Side-effects from mild topical steroids are uncommon.

    Thinning of the skin has always been considered a common problem. However, recent research suggests that this mainly occurs when high-strength steroids are used under airtight dressings. In normal regular use skin thinning is unlikely and, if it does occur, it often reverses when the topical steroid is stopped.
    With long-term use of topical steroid the skin may develop permanent stretch marks (striae), bruising, discolouration, or thin spidery blood vessels (telangiectasias).
    Topical steroids may trigger or worsen other skin disorders such as acne, rosacea and perioral dermatitis.
    Some topical steroid gets through the skin and into the bloodstream. The amount is usually small and normally causes no problems unless strong topical steroids are used regularly on large areas of the skin. The main concern is with children who need frequent courses of strong topical steroids. The steroid can have an effect on growth. Therefore, children who need repeated courses of strong topical steroids should have their growth monitored.




How Can Atopic Eczema Be Prevented?

It may be worth breast-feeding a newborn baby for three months or more if several members of the family suffer from allergies such as eczema, hay fever or asthma. There is, however, no evidence to suggest that the mother should avoid any particular foods during pregnancy or breast-feeding.

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