Sexual life has a certain trauma to the mucous membrane, there are several reasons for bleeding during sex: 1, no contraception, after pregnancy, intercourse will cause bleeding; 2, gynecological inflammation, such as cervical erosion will also cause bleeding during sex; 3, if ovulation intercourse will also cause ovulation bleeding; 4, almost menstruation or menstruation just after a relatively short period of time, intercourse will also cause bleeding. Frequent bleeding from sex needs to go to the hospital’s gynecology department for examination. If it is caused by inflammation, it needs to be treated in time with medication and gynecological examination to find out the cause. If you are pregnant without contraception, you should not have intercourse during this time, and you should undergo birth control treatment. If you have a bleeding period, pay attention to hygiene, prevent infection, do not have sex during this period, observe the bleeding time is not long, if more than a week need to take hemostatic drugs.