Some women experience premenstrual tension syndrome (PMS) before menstruation, mainly due to the imbalance of ovarian hormone levels and abnormal brain neurotransmitters. Premenstrual stress syndrome is mainly characterized by mental symptoms, such as irritability, anxiety, depression, and emotional instability before menstruation, and in some cases, fatigue, loss of appetite, and insomnia. Some women may even experience fatigue, loss of appetite, insomnia, etc. They may also experience a lack of concentration, resulting in very low work efficiency and a slight loss of memory. Do not be overly nervous, but adjust your psychological state, relax, get enough sleep, and do the right amount of exercise to ease PMS through psychological regulation.