Why do i bleed only when having sex ?

See your gyn: Either from vaginal, cervix or uterus problem or infection, you need an exam, vaginal cultures blood work and an ultrasound and your gyn should be able to determine the cause and txment.

A/W Dr. Patterson: Possible reasons for bleeding during or after sexual intercourse include: vaginal trauma, sexually transmitted disease, iud, cervical cancer, combination oral contraceptives (cervical erosion), endometriosis, vaginitis, ; adenomyosis. Medical evaluation is indicated.