Enterocolitis, in general, does not cause menstrual flow to become less heavy. Lower menstrual flow is considered to be related to excessive weight loss, ovarian failure, endocrine disorders, and multiple uterine operations. Enteritis is a large group of diseases, mainly including fungal, bacterial, viral, and parasitic infections, leading to acute and chronic inflammation of the intestinal mucosa. It may cause abdominal pain, diarrhea, fever, mucus-pus-blood stools, tarry black stools and other manifestations, and will not lead to low menstrual flow. Low menstrual flow may be caused by excessive weight loss leading to a decrease in body weight and body fat. As we age, the ovarian function declines, which may also lead to a decrease in menstrual flow. Overtime and late night work, irregular diet and excessive mental stimulation lead to endocrine imbalance and reduced menstrual flow. Multiple abortions, resulting in thinning of the uterine lining or uterine adhesions leading to decreased menstrual flow. It is recommended to go to the gynecology department of the hospital when you find a decrease in menstrual flow. If there are digestive system diseases, you can go to the gastroenterology department of the hospital for examination and treatment.