In general, constipation does not affect menstruation. In case of late menstruation or heavy menstruation, it is better to check endocrine and related gynecological diseases, and also to exclude pregnancy. In Chinese medicine, the human body is an organic whole, and the five organs and six bowels are interdependent and affect each other. Constipation in women may be caused by external cold and heat or internal injury to the diet, resulting in a deficiency of yin and yang, qi and blood, and eventually causing a loss of conduction in the large intestine, resulting in dry stools or poor discharge. When there is a stagnation of Yin and Cold in the body and a deficiency of Yin and Blood, it will affect menstruation, resulting in late menstruation or dark menstruation, and some women may even suffer from dysmenorrhea or infertility due to cold in the uterus. Therefore, in general, constipation usually does not affect menstruation, but the cause of constipation should be found, as constipation may be related to certain gynecological diseases. In clinical practice, abnormal menstruation is often closely related to gynecological diseases. Therefore, although constipation is not directly related to menstruation, it needs to be treated promptly and the specific causes of constipation need to be investigated to avoid affecting other parts of the body.