It may be normal to have menstruation for 30 days after a normal delivery, but pathologic causes such as cervicitis cannot be ruled out. 1. Normal situation: generally no breastfeeding mothers will resume menstruation earlier after giving birth, indicating that the mother’s physical condition is better, the ovaries and uterus recover faster after giving birth, so it can resume normal menstruation in 30 days after giving birth. 2. Cervicitis: If the mother after delivery combined with cervicitis and other diseases, due to the local mucous membrane is relatively weak, there may be a smooth delivery 30 days of bleeding, mistaken for menstruation, often accompanied by abnormal vaginal discharge and other symptoms. This, usually, is not normal. Women in labor need to eat more foods rich in protein, such as eggs, lean pork, soy products, and milk. It is also necessary to take appropriate supplements such as shrimp, fish, pork liver, oats, walnuts, peanuts, etc. Eat more fresh vegetables and fruits to ensure that the intake of food is nutritionally balanced and to avoid single nutrition. For breastfeeding mothers, usually in 6-10 weeks after giving birth to a child about menstruation, if the birth of 30 days to menstruation, at the same time, abdominal pain and other symptoms, it is recommended to seek medical attention in a timely manner, under the guidance of the doctor, improve the relevant examination, to clarify the cause of the disease, symptomatic treatment.