When having sexual inter course i tend to bleed. what is the reason ?

Evaluation: If you are having bleeding when having sex that is usually some type of irritation of the cervix. An infection would be common. You should be seen.

Vaginal bleeding: There can be many reasons for vaginal bleeding after intercourse. Some are benign and some are more serious. You need a healthcare professional to perform a pelvic examination and Pap smear. Good luck!