What causes frequent urination in pregnant women?

　　During pregnancy, expectant mothers often want to go to the toilet, the frequency of urination increases significantly, and they are often accompanied by symptoms such as urgency and pain during urination. How should expectant mothers deal with these problems? Could it be pathological frequent urination?

　　Frequent urination refers to increased frequency of urination. Normal adults urinate an average of 4 to 6 times a day during the day and 0 to 2 times at night after going to bed. ； If the frequency of urination increases significantly and exceeds the above range, it means frequent urination.

　　Reasons for frequent urination

　　Frequent urination is the most common symptom and trouble for expectant mothers. This is mainly due to the gradually increasing size of the vagina. Uterus and the fetal head press into the bladder, causing the expectant mother to have the urge to urinate, which may lead to frequent urination.

　　The bladder is located in front of the uterus. When you are 3 months pregnant, the uterus enlarges. When it comes out of the pelvic cavity, the enlarged uterus can be touched above the pubic symphysis. At this time, the enlarged uterus can stimulate the bladder in front, causing symptoms of frequent urination. After reaching the second trimester, the uterus slowly increases in the abdominal cavity, and the irritation symptoms to the bladder are reduced. After 28 weeks of pregnancy, irregular uterine contractions (uterine hardness) can occur normally, but there are generally no symptoms. ； Once uterine contractions stimulate the bladder, symptoms of frequent urination may occur. If you have not reached full term and have frequent uterine contractions, you should seek medical attention promptly to prevent premature birth occurrence.

　　In the late stages of pregnancy, around 38 weeks, the fetal head descends into the pelvis and can press on the bladder, causing symptoms of frequent urination. During the day, expectant mothers stand and sit, and the enlarged uterus compresses the large blood vessels in the abdominal cavity, causing venous return obstruction in the lower limbs, reducing renal blood flow, and reducing urine output during the day. Staying in bed at night reduces the pressure of the uterus on the inferior vena cava, increases renal blood flow, and increases nocturia. This is a very normal physiological phenomenon during pregnancy. However, if the "three symptoms" of polydipsia, polyuria, and excessive thirst occur along with a lack of weight gain, you should seek medical attention in time to eliminate the problem. gestational diabetes possible.

　　In addition, frequent urination may also have the following causes, such as: inflammatory stimulation, when there is inflammation in the bladder, nerve The sensory threshold is lowered and the urinary center is in an excited state, causing frequent urination and non-inflammatory stimulation.； Urinary tract stones and foreign bodies, usually with frequent urination as the main manifestation ； Reduced bladder capacity, such as bladder mass taking up space sexually transmitted diseases changes, tuberculous bladder contracture or larger bladder stones, etc.； Psychoneurotic frequent urination is only seen during the day or before going to sleep at night. It is often caused by mental stress or seen in patients with hysteria. At this time, it may also be accompanied by urgent urination and painful urination. If you have frequent urination accompanied by urgency and painful urination, you must seek medical treatment in time.

　　2 tips to prevent frequent urination

　　1. Expectant mothers should always replenish water appropriately, but do not drink excessive amounts of water.；

　　2. If the expectant mother feels the need to urinate, she must go to the toilet and try not to hold back her urine to avoid causing bladder infection and aggravating frequent urination.