is a mild form of chronic eczema (see DERMATITIS) occurring mainly on the face of children and upper arms of young adults. It is characterised by round or oval flaky patches which are paler than the surrounding skin due to partial loss of MELANIN pigment. The appearance is more dramatic in dark-skinned or suntanned subjects. Moisturising cream often suffices, but 1 per cent HYDROCORTISONE cream is more effective.

is a common eruption seen mainly in young adults possibly caused by Human Herpes Viruses 6 and 7. It usually begins as a solitary red flaky patch (often misdiagnosed as ringworm). Within a week this ‘herald patch’ is followed by a profuse symmetrical eruption of smaller rose-pink, flaky, oval lesions on the trunk and neck but largely sparing the limbs and face. Itching is variable. The eruption usually peaks within 3 weeks and fades away leaving collarettes of scale, disappearing within six or seven weeks. It rarely recurs is probably not contagious and there is no specific treatment, but crotamiton cream (Eurax ®) may relieve discomfort. Other varieties include Pityriasis versicolor (fungal) and rubra (EXFOLIATION).