Suggest Remedy For Soreness And Red Marks On Penis

Hi i am a 19 year old male and my penis was swollen last night because i was grinding on a girl or dry humping and while i was dancing i think some of the skin was rubbed off. After a night of sleep my penis isnt swollen any more but there is still red marks and it seems that some skin is missing(was rubbed off). I wanna know how long it would take to heal, if it can become a problem and how should i treat it