Women are particularly vulnerable to urinary tract infections during four special periods. Menstrual period I have met several patients who have minor urinary tract infections two or three times a year, and they occur quite regularly, three to five days after their menstrual period. Bacteria can easily breed and multiply in the menstrual blood and then contaminate the urethra. This, coupled with the fact that the body’s resistance decreases during menstruation, gives the infection a chance to take advantage of it. The urethra of a virgin is covered by the labia majora and labia minora, and the urethra is not in direct contact with the outside world, so it is relatively clean. After you start having sex, this natural barrier is destroyed. During the newlywed period, sex is more frequent, and the male and female organs are in close contact and friction, which opens the door for bacteria to invade. If you do not pay attention to the hygiene of sexual life will be more likely to get sick. The uterine cap and spermicide can disrupt the balance of bacteria in the vagina and reduce the protective bacteria, so that harmful bacteria will take advantage of the opportunity to attack. In addition, the newlywed period is busy with wedding banquets and honeymoon trips, the emotions are more exciting and the body is easily fatigued, the body’s resistance will be reduced. So many brides get sick during their honeymoon, bringing some trouble and embarrassment to the happy and romantic days. Pregnancy Because the huge uterus squeezes the bladder and urethra in the latter months of pregnancy, urine tends to stay in the bladder, and bacteria can easily grow in the non-flowing urine, so the chance of infection increases greatly when you are pregnant. Menopause is also the peak period for urinary tract infections because of the decrease in estrogen, degenerative changes in the mucosa of the urethra, decreased immunoglobulin and organic acid content, and decreased local resistance. According to statistics, after menopause, urinary tract infections increase by 1%-2% every 10 years.