Symptoms of minor urinary tract infections: First, frequent urination, early on there may be no symptoms of painful urination, only the increase in the frequency of urination, especially the increase in the frequency of urination at night. Second, urinary urgency, patients need to urinate as soon as they have the intention to urinate, can not hold urine for a long time, and even appear to have urgent urinary incontinence, some patients can not unclothe their pants, appear to have urinary incontinence. Third, painful urination, after urinary tract infection can have a slight pain in the small abdomen or pain in the urethra, but the pain is not obvious, the patient only feels a slight pain, swelling, burning, etc. in the urethra, but there is no obvious stinging sensation. Fourth, urine volume decreases, the patient urinates more frequently, but each time the urine volume decreases. After a mild infection, the bladder mucosa sensitivity increases, so when at least the amount of urine stored can produce a sense of urination, the patient will appear to have each time the urine volume decreases, but the overall frequency of urination throughout the day increased significantly.