There are many reasons why menstruation is getting less and less at the age of 38, such as premature ovarian failure, endometrial tuberculosis and so on. 1. premature failure of ovarian function: due to endocrine disorders, ovarian function decline caused by the proposal to go to the hospital in time to take blood tests hormone six, timely regulation of menstruation treatment. 2. endometrial tuberculosis: endometrial inflammation caused by tuberculosis bacillus, usually seen in patients with tuberculosis themselves, causing pelvic tuberculosis, endometrial tuberculosis can cause low menstrual flow, abdominal drop, low-grade fever, night sweats and other symptoms. 38 years old menstruation is getting less and less need to go to the hospital as soon as possible, by the doctor according to the specific conditions, to develop individualized diagnosis and treatment plan, so as not to delay the condition.