The causes of wanting to go to the toilet when the stomach hurts during menstruation include abdominal cold, dysmenorrhea, gastroenteritis and so on. 1. Abdominal cold: during menstruation, the patient does not do a good job of keeping the abdomen warm, resulting in abdominal cold and spasmodic contraction of the abdominal wall, which triggers the patient to experience abdominal pain and wanting to go to the toilet. 2. Dysmenorrhea: As the patient has dysmenorrhea, when dysmenorrhea occurs during menstruation, it will trigger other uncomfortable symptoms of the patient, such as cold sweating, pallor, lumbago, diarrhea and so on. 3. Gastroenteritis: If the patient is infected by bacteria, viruses and other pathogenic bacteria in the gastrointestinal tract during menstruation, an inflammatory reaction occurs, triggering faster intestinal peristalsis, causing the patient to experience abdominal pain and the feeling of wanting to go to the toilet. If the patient regularly appears to have the situation of wanting to go to the toilet as soon as the stomach hurts during menstruation, it is recommended that the patient go to the hospital in time to improve the relevant examination, to clarify the cause of the disease, and comply with the doctor’s instructions for treatment, so as to avoid delays in the condition. At the same time, pay attention to keep the abdomen warm during menstruation to avoid getting cold and triggering the symptoms of abdominal pain.