Hi,i have this burning sensation of my scrotum ,i don t know whats causing it,i have not indulged for over six months.When i sleep without panties it ok,but then when am in the office i have to be dressed up and so this is so uncomfortable,could this be an STI .I recently had an RPR test and it came out non reactive so i was placed on benzethine peniciline injections but after completion of this treatment,i started feeling this burning feeling.Please answer me