Bleeding during intercourse is usually associated with excessive force, cervical erosion, cervical cancer, etc. Bleeding caused by excessive force does not have much effect, but if it is caused by diseases, it will affect your health. 1. Excessive force: the forceful impact during coitus or too many times of coitus, resulting in the mucous membrane of the pubic area to break and cause bleeding, generally not much effect, limit the number of times of coitus, shorten the time of coitus can be, coitus action should be gentle. 2. Cervical erosion: mild and moderate cervical erosion caused by bleeding during intercourse is generally not a big problem, through timely treatment can be cured. If severe celiac disease causes contact bleeding, the problem is more serious, and if not treated in time, it is easy to become cancerous. 3. Cervical cancer: When the cervix becomes cancerous, the blood vessels will become brittle, which will easily cause bleeding during intercourse, and the disease is more serious, and if not treated in time, it will be life-threatening. Bleeding during coitus should consult doctor in time, and analyze the cause through hysteroscopy, cervical tct and pathological biopsy under the guidance of professional doctors, and then treat symptomatically.