Anatomically, the female urethra is characterized by its shortness, width, straightness and weak muscular strength, as well as its close proximity to the vagina and anus, which can add a lot of trouble to the bladder. Urinary incontinence is one of the most common troubles. On coughing, laughing, sneezing, or bending over, the urine flows out involuntarily because of the sudden increase of pressure in the abdominal cavity. Mild incontinence occurs in about half of all women at one time or another. The length of the urethra in adult women is only 3 to 5 centimeters, with an average of 3.5 centimeters. Experiments have shown that a urethra shorter than 3 centimeters cannot prevent the outflow of urine. At the same time, the woman’s urethra is wider than the man’s, the stroke is also more straight, it closes and opens mainly by the sphincter inside and outside the urethra diastole and contraction to complete, the anus, vagina and perineum muscles are also involved in synergistic effect. However, the contraction force of these muscles are not too strong, often can not resist the impact of high abdominal pressure, especially the elderly and frail women, more prone to urinary incontinence. Normal female urethra and bladder base angle of 90 to 100 degrees, the upper urethral axis and standing vertical line formed between the urethra angle of inclination of 30 degrees, usually is not allowed to urine casually out of the. But some women and young people usually like to wear tight clothes and pants and tight girdle, a long time, the bladder will be pressed forward and down, so that the urethra and the bladder connected to the rear angle of the increase in the straightening, so that the control of urination is not allowed, in the case of running, bending over, laughing, etc., the urine will be involuntarily flowed out. Due to the short urethra of women, the defense function is relatively weak, the vulva area, if you do not pay attention to clean, easy to cause bacterial invasion, the occurrence of cystitis. Not only increase the frequency of urination, there is a kind of discharge after urination feeling and abnormal pain, some people also have blood in the urine. In the case of poor human resistance, bacteria flow up the ureter, causing pyelonephritis on both sides. In some cases, a foreign body can enter the bladder of a woman. In cases of urinary tract infection, obstruction, malnutrition and metabolic abnormalities, some inorganic salts in the urine are deposited to form stones, which suddenly occur during urination and cause severe pain; only by changing the position can the stored urine be discharged. When the stones manipulate the bladder mucosa, hematuria is also discharged. Injuries inflicted on women during labor sometimes result in a vaginal vesicovaginal fistula, in which the urine flows involuntarily out of the vagina. Certain neurological disorders, due to neurotransmission malfunctions, but also the bladder “gate” switch failure, urinary retention, urinary incontinence. As you can see, women need to protect their bladders from trouble. Daily should keep the vulva clean, pay attention to sexual hygiene, tight clothing should not be worn for a long time (can be alternated with loose clothing), the belt should not be too tight, etc., are very important.