Hi Shyam, You are expected to give complete description- like place of your residence, size of lesion, whether indurated or soft in feel, continuous discharge or on & off discharge, whether discharging granules or something else, whether associated with pain or fever etc. It might be simple pyoderma, actinomycosis, atypical mycobacteriosis, or leishmaniasis. Some investigations like culture-sensitivity testing for bacteria, fungus and atypical mycobacterium, KOH examination, tissue biopsy and above all the direct visualization can give clue to final diagnosis. You need consultation with a dermatologist. Do not delay because of its benign looking character. Regards, Dr. Ajit Singh MD - Skin & VD