<s>[INST] 24 male, 5'6 130 lbs. No medical history or reacurring problems. Sinus and allergys. I have red spots on shaft of my penis. They fade (i haven't had enough time to completely let them fade out) but when I have sex or masterbate, they return to the same red color. They're not bumps. my girlfriend had a yeast infection. friction burns? Yeast infection? or std? [/INST] Hello, It could be friction burn probably. As a first line management, you can apply low potency steroid creams like betamethasone for symptomatic relief. If the lesion persists, it is better to consult a dermatologist and get evaluated. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr Shinas Hussain, General & Family Physician </s>