“…We found chronic pelvic inflammatory disease in almost 60% of cases of melasma [4], suggesting that melasma may be due to photosensitivity to C trachomatis in clinical or sub clinical chronic genitourinary infection in a large proportion of cases. This was later confirmed by the presence of antichlamydia IgM antibodies in significant number of patients of melasma [5]. Photosensitivity (PS), polymorphic light eruptions (PLE), rosacea, chronic actinic dermatitis (CAD), actinic prurigo (AP) like photosensitive skin diseases, the exact cause for which is not known, may be precipitated by C trachomatis infection and hence this study was done.…”