Pityriasis Alba

Synonym: Impetigo pityroides. Hindustani Synonym 'Thim'.

Pityriasis Alba is a common problem in practice. It is characterized by ill or well-defined, chronic patches of mild erythema, hypopigmentation and furfuraceous scaling. Size of patch is about that of a rupee; lesion is solitary or there may be 2-3 patches. The condition mainly affects the forehead, cheeks and chin of children, to a less extent, that of adults. It can occur at any time of the year, but is more common in cold winter and dry hot summer.

Though the exact cause has not been well established, the disease is usually attributed to a low grade streptococal infection in a run-down individual. It can also follow an attack of gastro-enteritis, dysentery or the use of broad-spectrum antibiotics. According to some authorities, lack of sunlight and avitaminosis are responsible for the condition. In India , people blame the dry weather and hence call it Kushki ke dag.

Treatment of Pityriasis Alba

It is a harmless, non-scarring and usually non-infectious affection, which responds slowly to treatment. The treatment consists of a nourishing diet, mild sunbathing, tonics, particularly vitamins, and the application of mild antiseptics like ammoniated mercury (5 per cent) ointment, Bradex-vioform (P), bacitracin ointment etc. Integument must be properly lubricated. Children should not play in the hot sun and cold winds.