hi first thought could be from masturbating if you use a tight grip and no oil? try just masturbating with a feather light grip and some baby oil. or this could be from washing powder either your mother you or your wife uses your getting a reaction to it it may have been changed at the time you got the rash? if so just ask for your under wear to have extra rinses or ask for them to be washed in some natural soap. just see how this goes. good luck
red spots on penis which looks like tiny pimples. i went to a dermat who recoed me some antibiotics and steriod creams. mid march after these spot had subsided i noted that my shaft was blood red but very dry so again visited dermat and he said its nothing but allergy and gave me moisturiser some steroid cream. now come mid april the red spots noted in mid feb are back again (although much lesser this time). i dnt have any other associated symptoms such as itching burning or pain during or without urination. but im worried about why it is taking so long to heal?