Pregnant women can consume fruits with high sugar content to play a diuretic role, the most important representative is watermelon. Watermelon not only replenishes the body with water in large quantities, but also increases the osmotic pressure of the blood, thus playing a diuretic role, and normal pregnant women do not need excessive diuresis. In the early stages of pregnancy, the enlarged uterus will compress the bladder and cause discomfort in urination, but this feeling is not changed by diuresis. It is recommended that women drink more water and urinate more often, and appropriate activities can avoid prolonged pressure of the uterus to relieve the pressure on the bladder. If the pressure cannot be relieved by conservative means, it is recommended that the patient should consult a hospital for relevant laboratory tests and examinations to exclude organic lesions of the urinary system in order to avoid delays.