<s>[INST] I have a very itchy purplish rash on my inner upper thighs and above my pubic area in the crease where my heavy stomach hangs. It started when I was sweating a lot working in the heat. I have tried Gold Bond powder to try to keep it drier, to no avail. It itches more at night than during the day. It is very ugly! [/INST] Hi, After reading your query it appears to be due to Fungal infection of the area which is quite common due to heat and humidity. Fungal infection of the skin is quite common due to infection and hygiene as well as most commonly due to diabetes. To prevent the further spread maintain good hygiene wash it two times properly. Stay away from hot and humid climate. If I were your dermatologist then would have prescribed clotrimazole cream or terminating cream over the affected areas under medical supervision. I suggest you to take antifungal tablet by mouth such as fluconazole 150 mg alternate days for 15 days. Take care. </s>