Lower urinary tract infections in women are a common condition, and the incidence increases with age. the incidence of bacteriuria is 1%-2% in girls aged 1 year, declines to about 1% after 1 year and continues through adolescence, and continues to increase with age through married and childbearing years. the incidence of bacteriuria is 2%-3% from 15 to 24 years of age, increasing to 10% at age 60, 20% after age 65, and 25%-50% after age 80. Maskell (1988) estimated that about 50% of women experience bladder irritation symptoms during their lifetime. To date, antibiotics have been the mainstay of treatment for lower urinary tract infections, and the increasing availability of various antibiotics has provided effective clinical treatment. However, not all cases are very effective. The short urethra in women and the large amount of bacteria stored in the entrance and vestibule make it easy to form lower urinary tract infections, and the causes of the disease vary among women of different ages. For this reason, we were the first in China to propose the idea of treating lower urinary tract infections in women by age, and after long-term clinical observation, the success rate of treatment has increased and the recurrence rate has decreased. Here we introduce the following. 1, prepubescent girls lower urinary tract infection characteristics and treatment: common causes are urinary tract infection patients within the family, common use of sanitary ware, or in the kindergarten towels mixed, or swimming in unclean water, or congenital malformations of the urinary tract, or neurogenic bladder urethral dysfunction. The key to treatment is to remove the cause (e.g. urinary tract malformation requires surgery), other types can be treated with appropriate antibiotics under the guidance of a doctor and attention to avoid recurrence. 2, adolescent and reproductive women lower urinary tract infection characteristics and treatment: (1) uncomplicated cystitis Most commonly seen in newly married women, or those who have a history of unclean intercourse for the first time. The onset of the disease is rapid, with symptoms such as frequent urination, urinary urgency, painful urination, and the presence of white and red blood cells in the urine, for this category of patients we take the simple use of antibiotics for three days to cure. (2) Recurrent urinary tract infections Lower urinary tract infections are recurrent, sometimes good and sometimes bad, and other pathogenic examinations such as leukocytes, trichomonas, fungi, etc. may be found in the white belt. The cause may be related to female anatomical abnormalities, history of repeated unclean intercourse, spouse or intercourse partner with urinary tract infection such as prostatitis, STD, etc. Our experience is to pay special attention to gynecological complaints and examinations, including vulvar itching, vaginal discharge odor, and routine leukorrhea examination. When abnormal leucorrhea is detected, the vaginal infection should be treated at the same time and the treatment effect is significantly improved. Special attention should be paid to the possibility of the presence of fungal vaginitis, otherwise the more antibiotics are applied, the more severe the symptoms become. Some patients have a history of repeated unclean sexual intercourse or the male partner has a serious genitourinary infection during the treatment process, which is difficult to cure. Patients should be reminded that the male partner should be examined and actively treated for prostatitis and venereal disease at the same time. 3, menopausal women lower urinary tract infection characteristics and treatment: menopause or after menopause lower urinary tract infection, recurrent, accompanied by perineal area dryness, burning sensation, pain, etc.. On physical examination, the vulva is atrophic, the vaginal wall is congested and painful to the touch, and the mucosa of the urethra is obviously congested and edematous in some patients. The main causes of lower urinary tract infections in menopausal and postmenopausal patients are (1) lower estrogen levels, thinning of the vaginal and urethral mucosal epithelium, and reduction of keratinized cells, which reduce the self-cleaning effect of the vagina and make it easy for bacteria to multiply in the vestibule and vagina, making it easy for vaginitis and urinary tract infections to occur. Therefore, in addition to antibiotics, we use estrogen preparations such as Levitra and topical estrogen preparations such as Bemelia for the treatment of lower urinary tract infections in menopausal women, which are very effective and can especially reduce the recurrence rate. However, it should be noted that estrogen preparations should not be used for a long time and it is recommended to do so under the guidance of a doctor. Before using estrogen preparations, it is also necessary to exclude their contraindications. (2) Combination of other diseases leading to recurrent infections, such as diabetes mellitus, urethral end stenosis, weakened contraction of the detrusor muscle, etc., may lead to urinary dysfunction.