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Contact dermatitis is a condition that causes inflammation of your skin.
There are several types of dermatitis. Atopic dermatitis often hereditary (runs in families), and it is linked to other conditions, such as asthma and hayfever.
Contact dermatitis occurs when your body comes into a particular substance which causes your skin to become inflamed. There are two types of contact dermatitis.
- Allergic contact dermatitis - this type of dermatitis is caused by an allergen. An allergen is a substance which causes your immune system (which normally fights illness and infection) to react abnormally. When you are exposed to an allergen for the first time, you become sensitised to it. After that, every time you have contact with the allergen, it causes a reaction.
- Irritant contact dermatitis - this type of dermatitis is caused by contact with an irritant. An irritant is a substance that damages the skin, causing it to be inflamed. It can occur in anyone who is exposed to irritants for a sufficient amount of time.
Both types of contact dermatitis can cause your skin to become red, blistered, dry and cracked.
Sometimes it is possible to have both irritant and allergic contact dermatitis at the same time.
Irritant contact dermatitis is more common than allergic contact dermatitis. Approximately 80% of contact dermatitis cases are caused by irritants.
Approximately 75% of all contact dermatitis cases affect the hands. It is also more common in women, with approximately 20% of females experiencing contact dermatitis on their hands at some point during their lives.
Contact dermatitis can develop at any age. Older people tend to be more sensitive to medicines, whereas young women are most at risk from cosmetics and substances used as part of their jobs. Contact dermatitis is less common in children, but the number of children with the condition is increasing.
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