Infection of the skin due to microscopic fungi, often yeasts (see lily of the valley) or dermatophytes. The latter are transmitted between children, others are spread by an infected animal or the earth.
These fungi are responsible for cutaneous lesions on the exposed areas and scalp lesions called ringworms.
After a mycological specimen which specifies the name of the dermatophyte, the doctor prescribes a suitable antifungal treatment, local and oral.