Constipation does not affect delayed menstruation and there is no connection between the two. Constipation is a disease of the intestinal tract, which refers to a decrease in the frequency of stools and can be accompanied by abdominal pain and bloating. In contrast, menstruation is a physiological characteristic of women, and delayed menstruation refers to the prolongation of the frequency of the normal menstrual cycle, which is a problem of the endocrine system. Therefore, there is no direct connection between constipation and delayed menstruation. The main reasons that can cause delayed menstruation include: 1, irregular work and rest: long-term lack of sleep and irregular work and rest may lead to endocrine disorders in women, resulting in delayed menstruation, while constipation may also be related to this factor; 2, drug factors: such as hormonal drugs, such as ethinyl estradiol, nil estrol, etc., may cause delayed menstruation; 3, mental factors: under the influence of excessive mental tension, anger, etc. Under the influence of emotions such as anger, can lead to delayed menstruation; 4, pregnancy: during pregnancy, women will not have menstruation, which is one of the typical symptoms of pregnancy; 5, excessive weight loss: in order to control weight, some women will over diet, resulting in delayed menstruation; 6, excessive exercise: when strenuous exercise, for physical strength belongs to excessive consumption, which leads to delayed menstruation and poor menstrual blood; 7, disease factors. Disease factors such as polycystic ovary syndrome, hypothalamic and pituitary disorders, Cushing’s syndrome, adrenal tumors, etc., can lead to delayed menstruation.