Hello I really appreciate your concern Looking at your description this could be suggestive of STI, other infection or an allergic reaction or may be penile cancer (very rare) I would like further information to help you better relevant medical history like diabetes or history of unprotected sex? Are you having any kind of discharge Since how long you have this problem In my opinion you should keep it clean and apply antiseptic ointment If it gets worsen or doesn t improve than you should consult your doctor for physical check up and detailed evaluation Maintain good hygiene use condoms during sex until it heals completely Hope this answers your question if you have any more doubts please feel free to write back to me, I will be happy to help you Best wishes