<s>[INST] I have a rash under the skin flap on my belly. I'm obese and I've had the rash on and off my lifetime it is progressively gotten worse. Can you help me by telling me what this is and how to best treat it. I shower once or twice a day to help with the soreness. This is the only thing that seems to help. [/INST] Hello,This is most likely a fungal rash. They tend to form in skin folds where it is warm and damp. Try using Lamisil (terbenifine) cream on it twice a day after showering. Once it is healed up use the cream twice a week just to keep it from coming back.Regards </s>