First your doctor will discuss your skin problem with you. Subjects discussed include:
* The site where your rash began and how it developed.
* The trestments you have tried.
* Previous skin disease.
* The general health of your and your family, especially any tendency to get one or a combination of asthma, hay fever or eczema.
* Cosmetics and toiletries used.
* Your occupation - this will focus on materials used at work and the effect of weekends and holidays on your dermatitis (if it settles during these times, it is likely that you are in contact with an allergen at work). If other workers are affected with a similar rash then tell your doctor.
* Your hobbies.
If you can think of anything that you were in contact with around the time the rash first appeared then tell your doctor. Do not assume that just because you have been using something previously without a problem, it will not be the cause. Sometimes a cosmetic that you have been using for some time can become the cause of dermatitis.
Your doctor will then examine your skin. The dermatitis is usually most severe at the site of exposure, but can be widespread (for example, if a patient with an allergy to a substance in nail varnish touches her face, the dermatitis may spread).
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