It is likely to be phimosis. If not treated it can lead to erection problems, problem (bleeding, pain) during sex, urine infection and even
kidney problem. Do not ignore it. You will be cured by circumcision operation. However, you can try local anaesthetic jelly and gentle stretch until you are seen by the doctor. But DO NOT STRETCH it forcefully, in that case you will land up in paraphimosis, which is a medical emergency.