Normal menstrual cycle of about 28 days, a week in advance and a week back are normal physiological phenomena. Menstruation is delayed for three days to the onset of vague pain in the stomach, the possible causes of this situation mainly include: 1, blood deficiency: due to the patient’s long-term poor dietary and living habits or suffering from chronic hemorrhagic diseases leading to blood deficiency, affecting the menstrual blood, menstruation is delayed to the onset of vague pain in the lower abdomen. Patients in this situation often appear at the same time palpitations, dreamy, pale lips and mouth, dizziness and dizziness symptoms. 2, body cold: patients long-term lack of physical exercise, resulting in their own body yang qi is weak, if the cold stimulation will lead to cold inside, so that the menstrual period is delayed, and at the same time, cold pain in the lower abdomen. 3, liver depression and stagnation of qi: mainly related to long-term adverse emotional reactions, such as overthinking, emotional suppression, excessive pressure. Patients often have symptoms such as delayed menstruation, distension and discomfort in the chest, ribs and lower abdomen, bitter mouth and dry throat.