is on the groin fold (upper part of thigh) or lower thigh.. front or thigh or back? do you get similar lesions in the arm pits also? do they leave scars when they heal? do you sugar problem? any other illness? diabetes in your parents or grandparents? you problem needs to be properly assessed and examined if its happening again and again. Get an online consult privately with pictures or meet a dermatologist directly for a proper evaluation of the condition. Hope this was helpful.