There is a little blood and gray secretion after coitus is generally abnormal, may be associated with rough behavior during coitus and gynecological diseases such as vaginitis, cervicitis and so on. 1. rough behavior: women during sex, if there is a rough form of sexual behavior, may cause damage to the female vagina and other parts of the injury, resulting in local bleeding, local bleeding in the vagina under the influence of the acidic environment into a gray secretion. 2. Gynecological diseases: If a woman’s body has gynecological diseases, coitus may also appear bleeding, such as more common vaginitis, cervicitis, pelvic inflammatory disease, cervical cancer, etc., due to the two sides of the coitus stimulation and thus cause the disease symptoms to aggravate the situation, bleeding and abnormal secretions. There may be other reasons for a little blood and gray discharge after intercourse, so it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.