The causes of hidden pain on the right side of the abdomen in pregnant women include the following: first, it may be the possibility of chronic appendicitis, especially in women after pregnancy local uterine pressure on the right side of the abdominal intestine, which can easily lead to the possibility of chronic appendicitis attacks, the patient often pain is not very obvious, appearing vague pain, intermittent attacks. Secondly, it may also be caused by stones in the ureteral urinary system, often accompanied by frequent urination, urinary urgency and even the possibility of hematuria, which must be accompanied by bed rest and appropriate amount of water to promote the elimination of stones. Third, it may also be due to the physiological pressure pain caused by the gradual enlargement of the fetus and the uterus, which compresses the tissues of the right pelvic abdominal wall, and the pain will be gradually relieved after the delivery.