If the pain appears in the right lower abdomen and the pain location has shifted, it is mostly seen in acute appendicitis. 2. If the pain appears in the right lower abdomen and is accompanied by symptoms such as frequent urination, urgent urination and painful urination, it is mostly seen in acute cystitis. 3. If the pain appears in the right lower abdomen and is accompanied by abnormal vaginal bleeding or tearing pain, it is more likely to be due to preterm abortion or ectopic pregnancy rupture. If a pregnant woman has abdominal pain and discomfort, she should pay attention to it and seek medical consultation and treatment as soon as possible. If the pain in the right abdomen during pregnancy is mild and tolerable, and there is no other discomfort, it is mostly due to the strain on the uterine ligaments and the pressure on the surrounding tissues as a result of the enlargement of the uterus, and does not require special treatment.