Hello I appreciate your concern Looking at your description this could be due to Infection like epididymoorchitis , allergy or inflammation and varicocoele If you can upload me a ultrasound report, I will be able to help you better I would like further information like your age, History of other metabolic or skin disease or diabetes since how long you have this problem? In my opinion you should consult a VD and Skin specialist for physical examination colour doppler of testis and confirmation of diagnosis Meanwhile you can apply any antiseptic or antibacterial ointment like mupirocin Use condom during sex Hope this answers your question Thanks and regards