Ringworm is not a worm. It is a general term for a common fungus infection of the skin. It is called ringworm because the infection often appears as a round shape or ring.
Ringworm is particularly common among children, but people of any age can catch it.
The infection often appears in a round, ring shaped patch. It is red or silvery, with scales, and is itchy. The edge is red and may be raised. The ring spreads outwards and the centre may heal and go back to a normal skin colour.
There may be several patches, not just one, and they may blister and ooze pus. Patches can range from a few millimetres to a few centimetres in size.
Diagnosis of ringworm can often be based on the characteristic scaly red ring on the surface of the skin.
A small sample of skin can be taken by gently scraping the affected area. The sample can be tested and looked at under a microscope.
Antifungal creams are effective in clearing most cases of ringworm on the body (apart from scalp and nail infections). Powders, lotions and creams are available over the counter from your pharmacist, and if you catch the infection early on, you may not need to see your GP.