, which changes from lighter to darker alot but is never always red.. Haven't been sexually active for a few years, and it was mostly oral. I'm quite concerned to the problem, because the testicles
Hello,
This redness of penis and scrotum can be due to dermatitis skin or skin infection. You can apply some calamine lotion at the rash as it will help in soothing the skin. Also wear cotton undergarments. Application of mild corticosteroid cream and oral antiinflammatories like ibuprofen/acetaminophen are also helpful. If the symptoms are severe then it will be best to consult a dermatologist
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.