After coitus small stomach pain, want to stool may be uterine contraction stimulation anus, coitus action too violent, gynecological diseases, etc. caused by: 1, uterine contraction stimulation anus: coitus, women’s vagina, the abdominal cavity and pelvic organs to produce a violent stimulation, causing pain, at the same time, uterine contraction stimulate the anus, appeared to have a desire to go to the toilet. Generally normal, can be relieved after rest; 2, coitus action is too violent: coitus process, action is too violent, resulting in a strong impact on the lower abdomen, resulting in pelvic organs congestion, edema, and even mucosal damage, triggering abdominal pain and anal swelling symptoms. Most can be relieved after rest, if accompanied by bleeding, it is recommended to consult a doctor in time; 3, gynecological diseases: endometritis, cervicitis, vaginitis, pelvic inflammatory disease and other diseases of the patient, semen stimulation after coitus will lead to mucosal contraction, aggravating the discomfort of the body. Appearance of the above symptoms, it is recommended to consult a doctor in a timely manner to clarify the cause of the disease and treat the cause; 4, ovarian luteal cyst rupture: if in the luteal phase of the menstrual cycle, usually the 20th-28th day of the menstrual cycle, have sex, when the luteal volume reaches its peak, there is the possibility of rupture of the ovarian luteal cysts, which is manifested by the sudden onset of pain in the lower abdomen, nausea, vomiting, and frequent urination and defecation. Should immediately seek medical attention, bleeding less bed rest, application of hemostatic drugs; bleeding more, shock, anti-shock at the same time surgical treatment, such as luteal cyst removal surgery. Precautions during intercourse should be gentle, pay attention to abdominal warmth, abnormal symptoms after intercourse should be timely medical care, clear causes, treatment, so as not to delay the condition.