At the age of 20, low menstrual flow and excessive leukorrhea may be caused by endocrine disorders, excessive stress, gynecological inflammation and other reasons. 1. Endocrine disorders: endocrine disorders are mostly due to hormone production too much or too little, hormone resistance in the target tissues and other pathologies caused by the human endocrine system functionally abnormal, which will cause the body’s estrogen secretion to decrease, which will cause low menstrual flow, leucorrhea, and more. 2. Excessive stress: If long-term excessive tension and stress, it will lead to the imbalance of female estrogen secretion, manifested as reduced menstrual flow, leukorrhea abnormalities, in ordinary life should maintain a good state of mind, pay attention to the combination of work and rest. 3. Gynecological inflammation: most of the gynecological inflammation is caused by not paying attention to hygiene, physical weakness, pathogen infection and other factors, in the clinical situation will be manifested as an abnormal increase in leukorrhea, pain during sexual intercourse, menstrual flow reduction. It is recommended to go to the hospital for examination to clarify the cause of the disease and timely symptomatic treatment.