Brief Answer: STI or inflammation following a trauma during rough sex Detailed Answer: Hello dear I had gone through your question very diligently and I can understand your concern I see such patients in my clinic routinely and I will definitely help you as well in best possible way Looking at your history and photos this could be STI (sexually transmitted infection) I would advise you for a battery of tests like blood for hemoglobin CBC liver and renal function test blood sugar urine culture and sensitivity test and swab culture from discharge you may require a course of antibiotics under supervision of your doctor To help you better I would like further information like any recent exposure to unprotected sex? since how long you are having this problem? Meanwhile please follow these guidelines wash it with antiseptic soap or solutions apply antiseptic ointment like mupirocin maintain good hygiene Waiting for your reply Follow up questions are most welcome wishing you rapid recovery and good health Regards