The pain around the navel in 4 months of pregnancy may be caused by physiological reasons, acute gastroenteritis and other reasons. 1. Physiological reasons: after pregnancy, with the increase of gestational weeks and the enlargement of the uterus, can have a certain pull on the surrounding abdominal skin, may cause pain around the umbilicus, only manifested as pain in the skin around the umbilicus, mild pain, not accompanied by other uncomfortable symptoms, this is a normal physiological phenomenon, do not need special treatment. 2. Pathological causes: such as acute gastroenteritis, mostly from unclean diet or improper diet history, can cause abdominal pain, pain sensation around the umbilicus, etc., can also be accompanied by diarrhea, fever, vomiting and other symptoms, can be combined with the medical history, clinical manifestations and physical examination can assist in the diagnosis. Need to go to the hospital in a timely manner, and follow the doctor’s instructions to give rehydration, pain relief and antispasmodic treatment. When the pain around the navel in the 4th month of pregnancy, you need to go to the hospital in order to identify the cause and timely treatment.