In the early stages of pregnancy if you hold your urine in large quantities and for relatively long periods of time, it can stimulate and cause uterine contractions, which can clinically lead to tummy pain. Tummy pain can also occur if the bladder is overfilled, and timely drainage of urine is sufficient. If the lower abdominal pain still occurs after the urine is discharged, it is likely to have been stimulated to cause uterine contractions resulting in pain. It is recommended to go to the hospital for examination, mainly to exclude the possibility of preeclampsia. If uterine contractions occur, it is recommended that oral progesterone can be taken clinically. Progesterone is a progestin that inhibits the contraction of uterine smooth muscle and relieves stomach pain. In addition, it is not recommended to hold urine during pregnancy, holding urine will not only cause discomfort, but also stimulate uterine contractions and affect the uterus, so when there is urine in the clinic, it should be discharged in a timely manner.