Menstruation is clinically known as menstruation, and the feeling of auntie in the week before menstruation is considered to be premenstrual syndrome (PMS), which is related to the individual’s hormone level, psychological factors and other factors. 1. Hormone levels: the week before menstruation, women’s ovarian hormone levels will fluctuate dramatically, resulting in the withdrawal of estrogen and progesterone in the late luteal phase, which can lead to headaches, abdominal cramps and other premenstrual syndrome. 2. Psychological factors: If a woman works under too much pressure and is anxious and tense during the week before menstruation, insomnia and irritability may cause changes in the body’s internal environment, leading to PMS. 3. Other factors: the concentration of opioid peptides in women’s bodies in the week before menstruation will gradually decrease with the arrival of menstruation, in addition to γ-aminobutyric acid or 5-hydroxytryptophan and other neurotransmitters will be abnormal, which will lead to women’s irritability, breast tenderness, axillary lymphatic swelling and other premenstrual syndrome. Women with PMS in the week before menstruation will have most of the symptoms subside on their own after the onset of menstruation, but if the symptoms cannot be relieved, it is recommended to go to the gynecology department of a regular hospital for consultation.