Seasonal variation of skin diseases in Nepal: a hospital based annual study of out-patient visits.

The aim of this study was to determine whether there was seasonal variation in skin diseases amongst dermatology out-patients in Nepal. A retrospective study was done of all new out-patients visiting a single dermatologist, at the Om Hospital and Research Center, Kathmandu, Nepal. The study population comprised all new patients visiting the dermatology out-patient department, between January and December, 1999. Data were obtained from the hospital out-patient records and analyzed. The total number of patients with skin diseases was 1746 (Males-793; Females-953). Majority (28.6%) of the visits was in spring and the three most common diagnoses included fungal infections, acne and melasma. All skin diseases showed statistically significant seasonal variation. It is clear that occurrence of certain skin diseases in Nepal show a significant seasonal trend.