Does the foreskin never go back... do you feel it is stuck or is it very tight? Having sex in this condition can cause pain. You may be aware that a sticky substance called smegma gets accumulated under the forskin which must be cleaned while bathing... is it that? if yes please clean yourself gently but daily. But if it is not that and actually the foreskin is too tight causing pain during erection, then Puttarji, you have to see a doctor... do it soon, the earlier the better. It may require a small cut, nothing to be afraid off, its a very simple and small , quick procedure. If you would like to join in on a further discussion on this topic, join our discussion board, "Just Ask” https://lovematters.in/en/forum