Aunt refers to menstruation, a month without menstruation need to be divided into circumstances to determine, generally can be divided into physiological reasons and pathological reasons. 1. Physiological reasons: early pregnancy, mental stress, excessive dieting and weight loss, etc. can cause menstruation to be delayed or stopped. 2. Pathological reasons: polycystic ovary syndrome, pituitary tumor, uterine adhesions, hyperprolactinemia and other diseases may also lead to menstruation for a month. It is recommended that patients do not need to be anxious if they do not have menstruation for a month, they can use early pregnancy test paper to measure urine, ultrasound examination. After ruling out early pregnancy, you can ask the doctor, if necessary, for examination, to clarify the cause of the disease, under the guidance of the doctor for standardized treatment.