the is a very unusual sex-related injury. are you sure you didn't mistake your partner for a cactus? the damage should heal spontaneously in a few days assuming you don't injury it again but a little topical antibiotic ointment would be helpful. if you do not improve it would be advisable to see your medical provider for an examination. expect to see some raised eyebrows regading the mechanism of injury. if it's on the inside you should rest it and perhaps go to the doctor. but i've had plenty of skin irritation from rough sex or masturbation. the best thing for this kinda stuff is a creme called man1 man oil. it is a multi-vitamin creme made just for the penis skin and both repairs and strengthens it naturally. all you need to do is rub it into your penis skin once a day. there are other benefits too so you might want to check it out. hope this helps.
what should u do if u cut or scrape the inside of the penis or urethra during rough sex