The hidden pain in the abdomen after 1 month of pregnancy needs to be specifically analyzed according to the state of the pain, which may be a normal physiological reaction to pregnancy or caused by pathological factors such as ectopic pregnancy and pre-eclampsia, which requires timely access to the hospital for ultrasound examination and then targeted treatment. Common causes and treatment 1. Normal physiological reaction: it is common that the hormone level in the body is increased and the uterus is enlarged. The rise of estrogen and progesterone in the body during pregnancy will lead to relaxation of the muscles and ligaments in the abdominal cavity, causing a slight pain sensation in the abdominal cavity. The uterus will also continue to expand in the abdominal cavity due to the growth and development of the fetus, and the blood supply will be richer at this time, causing more obvious pelvic congestion, which can also cause hidden pain in the abdomen. The abdominal pain caused by physiological factors can be relieved by bed rest, generally without special treatment; 2, pathological factors: can be caused by ectopic pregnancy, pre-eclampsia, uterine inflammation and appendicitis and other diseases, usually accompanied by vaginal bleeding, need to promptly seek medical attention, ultrasound examination to clarify the cause, under the guidance of doctors for anti-inflammatory, fetal preservation treatment, if necessary, feasible surgery to ensure the safety of pregnant women. Pregnant women need to pay attention to their health condition and go to a regular hospital in time if they find any discomfort. In normal life, you can supplement your body with the necessary nutrients and take folic acid under the guidance of the doctor to ensure the normal development of the fetus, as well as regular maternity checkups to keep an eye on the condition of the pregnant woman and the fetus in a timely manner.