Painful urination in women is usually caused by acute cystitis. Because women’s urethra is shorter and straighter, and close to the vagina and anus, it is easy to be contaminated, especially E. coli from the anus, which can easily invade the urethra and cause acute cystitis. The symptom of acute cystitis is that the onset of the disease is relatively acute, there will be frequent urination, urgency, painful urination, the feeling of incomplete urination, in addition, there will be burning in the urethra when urinating. At the end of urination, there is sometimes hematuria, and the bladder area, or the perineum, is sometimes distended. In addition, acute cystitis urinary frequency is sometimes very serious and can manifest as urge incontinence. Painful urination should go to the hospital to do a routine urinalysis, routine urinalysis will find an increased white blood cell count, each high power microscope field of view will be greater than 5, this situation can be diagnosed as acute cystitis.