This is a type of skin inflammation that can cause severe dandruff and also affect other areas of the body. It is not known exactly what causes it, but it is thought to be triggered by an over-reaction to the same fungus that causes dandruff.

What are the symptoms?

In mild cases, bad dandruff may be the only symptom. In more serious cases, patches of red, scaly, greasy skin may also develop. Yellow-brown crusts can form on top of these patches, which may be itchy and slightly raised. The scalp might also be sore. Some people can develop symptoms on the outer ear as well as the eyelids. In severe cases, the rash can affect most of the face, scalp, neck, armpits, chest and groin.

What are the treatment options?

An antifungal shampoo can be used, but if this is not sufficient to control the problem, a GP may prescribe an oral antifungal or antibiotic treatment.