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Eczema
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About Eczema:
Eczema, or dermatitis as it
is sometimes called, is a group of skin conditions which can
affect all age groups. In the United Kingdom, up to one fifth
of all children of school age have eczema, along with about
one in twelve of the adult population. The severity of the
disease can vary. In mild forms the skin is dry, hot and
itchy, whilst in more severe forms the skin can become broken,
raw and bleeding. Although it can sometimes look unpleasant,
eczema is not contagious. With treatment the inflammation of
eczema can be reduced, though the skin will always be
sensitive to flare-ups and need extra care.
Causes of Eczema
The causes of eczema are many and varied, and depend on the
particular type of eczema that a person has. Atopic eczema is
thought to be a hereditary condition, being genetically
linked. It is proposed that people with atopic eczema are
sensitive to allergens in the environment which are harmless
to others. In atopy there is an excessive reaction by the
immune system producing inflamed, irritated and sore skin.
Associated atopic conditions include asthma and hay fever.
Other types of eczema are caused by irritants such as
chemicals and detergents, allergens such as nickel, and yeast
growths. In later years eczema can be caused by a blood
circulatory problems in the legs. The causes of certain types
of eczema remain to be explained, though links with
environmental factors and stress are being explored.
Types of Eczema
Atopic eczema
Atopic eczema is the commonest form of eczema and is
closely linked with asthma and hay fever. It can affect both
children and adults, usually running in families. One of the
most common symptoms of atopic eczema is its itchiness (or
pruritis), which can be almost unbearable. Other symptoms
include overall dryness of the skin, redness and inflammation.
Constant scratching can also cause the skin to split, leaving
it prone to infection. In infected eczema the skin may crack
and weep (‘wet’ eczema). Treatments include emollients to
maintain skin hydration and steroids to reduce
inflammation.
Allergic contact dermatitis
Develops when the body’s immune system reacts against a
substance in contact with the skin. The allergic reaction
often develops over a period of time through repeated contact
with the substance. For example, an allergic reaction may
occur to nickel, which is often found in earrings, belt
buckles and jeans buttons. Reactions can also occur after
contact with other substances such as perfumes and rubber. In
order to prevent repeated reactions it is best to prevent
contact with anything that you know causes a rash.
Irritant contact dermatitis
This is a type of eczema caused by frequent contact with
everyday substances, such as detergents and chemicals, which
are irritating to the skin. It most commonly occurs on the
hands of adults and can be prevented by avoiding the irritants
and keeping the skin moisturized.
Infantile seborrhoeic eczema
A common condition affecting babies under one year old, the
exact cause of which is unknown. Also referred to as cradle
cap, it usually starts on the scalp or the nappy area and
quickly spreads. Although this type of eczema looks
unpleasant, it is not sore or itchy and does not cause the
baby to feel uncomfortable or unwell. Normally this type of
eczema will clear in just a few months, though the use of
moisturizing creams and bath oils can help to speed this
along.
Adult seborrhoeic eczema
Characteristically affects adults between the ages of 20 and
40. It is usually seen on the scalp as mild dandruff, but can
spread to the face, ears and chest. The skin becomes red,
inflamed and starts to flake. The condition is believed to be
caused by a yeast growth. If the condition becomes infected,
treatment with an anti-fungal cream may be necessary.
Varicose eczema
Varicose eczema affects the lower legs of those in their
middle to late years, being caused by poor circulation.
Commonly the skin around the ankles is affected, becoming
speckled, itchy and inflamed. Treatment is with emollients and
steroid creams. If left untreated, the skin can break down,
resulting in an ulcer.
Discoid eczema
Is usually found in adults and appears suddenly as a few coin
shaped areas of red skin, normally on the trunk or lower legs.
They become itchy and can weep fluid. Usually discoid eczema
is treated with emollients (and steroid creams if
necessary).
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