Hey sir/mam, after masturbation, I feel burning sensation on my right upper back which last for 1 day after masturbation and after that it goes away. This is only the burning sensation I feel & I have no problem in bending or moving the back or shoulder. So do not know what is this? Please help me to avoid it. This burning sensation is happening from many years after every masturbation which remain till one day after masturbation.