The common causes of menstruation at the age of 50 include physiological factors, mental and psychological factors, endometrial damage, cervical cancer and so on. 1. Physiological factors: due to the age factor, 50-year-old women have entered the perimenopausal period, manifested in the gradual decline of ovarian function, luteinization insufficiency, and so on, and then make the body’s hormone level decline, resulting in menstruation only a little bit, but also may appear panic, chest tightness and other symptoms. This is a normal physiological phenomenon, generally do not need treatment. 2. Mental and psychological factors: If the work pressure is too large, poor mood, long-term in a state of mental tension, it will lead to endocrine disorders, which in turn will cause a decrease in the amount of menstruation, manifesting itself as menstruation only a little. It is recommended to adjust the bad mood in time, maintain sufficient spirit, and avoid excessive pressure. 3. Damaged uterine lining: For example, low estrogen level, severe uterine adhesion, cervical adhesion, etc., which cause the uterine lining to be damaged and thinned, and then lead to a decrease in the amount of menstruation, only a little bleeding. Hysteroscopic adhesion separation can be done under the guidance of doctor. 4. Cervical cancer: It belongs to one of the common malignant tumors in gynecology, usually due to persistent high-risk HPV infection. Patients may have symptoms such as lumbago, abdominal pain, abnormal vaginal bleeding, which is manifested as menstruation with only a little bit of menstruation, and at the same time is mostly accompanied by a foul odor. In conclusion, at the age of 50 with only a little menstruation, it is recommended to go to the hospital in time for a clear diagnosis and symptomatic treatment. At the same time, we should pay attention to personal hygiene, take a shower and change underwear frequently.