The possible causes are as follows: First, if you drink a lot of water, drink a lot of water in a short period of time or drink drinks containing sugar, get cold, etc., it can cause transient urinary frequency and increase the frequency of urination, but it is usually not accompanied by painful urination or back pain, fever and other symptoms, and the symptoms can be relieved after stopping the relevant fluid intake; Second, if there is an acute infection of the urinary tract, it can be accompanied by urgency, painful urination or a sense of incomplete urination. Second, if there is an acute infection of the urinary tract, frequent urination can occur, accompanied by urinary urgency, painful urination or incomplete urination, and may be accompanied by increased discharge from the urethra, which requires further urinalysis or urine culture to confirm the diagnosis; Third, if there are stones, tumors, polyps and other stimuli of the urinary tract, it can also cause frequent urination, accompanied by visual or microscopic hematuria, etc., and may also If there are stones, tumors, polyps and other irritations in the urinary tract, they can also cause frequent urination, accompanied by hematuria or microscopic hematuria, and may be accompanied by pain in the area where the lesion is located.