Diarrhea does not usually affect the amount of menstrual flow and does not reduce menstrual blood. If you don’t pay attention to your diet and like to eat cold food, it may cause a decrease in menstrual flow. More common is the recent work pressure is relatively large, do not pay attention to rest, often stay up late or too much tension and anxiety, may cause menstrual bleeding, it is recommended that you can pay attention to regulate the mood when necessary need to go to the Obstetrics and Gynecology Department for consultation. If diarrhea occurs, it is important to note that there may be intestinal infections, such as acute enteritis caused by improper diet or caused by gastrointestinal dysfunction, it is recommended to go to the hospital to complete the stool routine plus occult blood test and rotavirus examination to determine what causes diarrhea, if necessary, with the doctor to give the use of probiotics, combined antibiotics or antiviral drug therapy, and so on. Diet should pay attention to the light diet, especially during the menstrual period must pay attention to rest, pay attention to abdominal warmth, but also to maintain a happy mood.