Generally speaking, it is normal for pregnant women to leak urine when they vomit, because when pregnant women vomit violently, the pressure in the abdominal cavity will continue to increase, and the abdominal pressure will be continuously transmitted to the pelvis, the pressure squeezes the bladder and urethra, and the pressure transmitted to the bladder and urethra is different, the pressure transmitted to the bladder is obviously > the pressure transmitted to the urethra, coupled with the increase in the uterus due to the increase in the size of the pregnant woman occupying the space of the pelvis, squeeze the bladder, so that the effective capacity of the bladder is obviously reduced, when the pressure in the bladder is obviously > the pressure in the urethra, then the leakage phenomenon will occur. When the pressure in the bladder is significantly higher than the pressure in the urethra, urine leakage will occur. If the leakage stops after the vomiting subsides, it is not a cause for concern, and the leakage will resolve on its own after full-term labor. If the leakage is particularly severe and persists after full-term delivery, it is advisable to consult a urologist to investigate the cause and to provide the necessary treatment.