only a doctor can say for sure but from what you’ve said it sounds like some form of dermatological irritation. if that is the case try using a top notch penis health cream (health professionals recommend man1 man oil). look for one that includes a high end emollient like she abutter to soothe the irritated skin and help moisturize the skin. good luck!
i have a light red sometimes purpleish rash on the shaft of my penis. i have tried using cortizone and a lamisil atf. i have had the rash for about a month it does not itch or burn. there is no discharge or anything like that it is just there and it is driving me nuts. when i first noticed it i frequently masturbated at least once a day of not more since i have slowed down to nearly at all but the rash will not go away regardless of what i try. please help