Hello I share your concern, i will try to help you out in best possible way. Looking at your description this could be STI or other infection or allergic reaction. I would like further informationto help you better Your age and relevant medical history like diabetes or other metabolic disease Any recent exposure to unprotected sex? You should ask your doctor for few investigations to confirm the diagnosis like Urine culture and sensitivity test as well as pus culture of the discharge from the rash you can rule out the possibility of HIV by an ELISA test after a window period of 3 to 6 months about which your doctor knows. Apart from.this blood sugar fasting and post prandial and Blood for CBC and liver function test are also advisable. Maintain good hygiene Wash and clean your private parts with antiseptic solution or soap routinely Use condom during sex Hope this answers your question please feel free to ask for more clarification Thanks and regards