Hello I share your concern Looking at your history this could be a sign of STI If you can upload us a photograph, I will be able to guide you better I would like to know about your age and history of exposure to unprotected intercourse? I would advise you to consult a venerologist/dermatologist for examination and a battery of tests to confirm the diagnosis and treatment accordingly Maintain good hygiene Wash it with antiseptic solution and apply antibiotic ointment like soframycin or mupirocin to avoid superadded infection Hope this answers your question Best wishes