<s>[INST] I developed a rash on my hand that has now spread under my armpits, the back of my leg behind my knee, my arm and my groin area.  Im 30 years old and work in a research lab with know previous problems with a rash.  I dont take any prescription drugs or any other drugs either.  Does anyone know what this is? [/INST] Hello, Thank you for posting on Chat Doctor. It seems you are suffering from Tina courts and corporal, a kind of fungal infection. I would suggest you to consult your dermatologist for proper management of the condition. I usually recommend proper course of oral antifungal Chat Doctor.  You can additionally use antifungal dusting powder containing ketoconazole during daytime and a soap containing ketoconazole for rinsing of affected areas. Take oral antihistamines for itching as required. Maintain hygiene over those areas and avoid wearing tight undergarments. Hope your queries are resolved and wish you best of health. Kindly spare some time to rate my answer and  </s>