Low menstruation in a woman in her forties may be caused by a disordered work schedule, or by diseases such as hyperprolactinemia and premature ovarian failure. There are different treatments for different causes, such as general measures and medications. 1. Disordered work and rest time: If you often stay up late and don’t get enough sleep, it may lead to low menstruation and disrupted menstrual cycle. Patients are advised to maintain a stable work schedule and not to stay up late. You can soak your feet in hot water before going to bed to improve the quality of sleep. 2. Hyperprolactinemia: Patients are prone to scanty menstruation and headaches. Patients should rest more and avoid overwork. During the period, you can follow the doctor’s instructions to take oral quinagolide, cabergoline and other dopamine agonist drugs treatment. 3. Premature ovarian failure: patients are prone to flushing, increased sweating, infertility and other symptoms. Daily need to maintain a good mood, regulate bad mood. At the same time, follow the doctor’s instructions oral progesterone, dydrogesterone and other progestin drugs treatment. It is recommended that women in their forties with low menstruation should go to the gynecology department in time for appropriate examination to determine whether they are suffering from the disease.