Check no inflammation but always frequent urination, may be physiological factors, polyuria frequent urination, neurogenic frequent urination, bladder capacity reduction frequent urination, periurethral lesions and other causes. 1. Physiological factors: such as drinking more drinks or water, mental stress, cold environment, can lead to increased urination, mostly normal phenomenon. Reduce the intake of liquid, improve the environment, adjust the mood, usually can improve the situation of frequent urination. 2. Pathologic factors: (1) polyuria urinary frequency: increased urination, and each time the urine volume is not less, and the total urine volume increases. See diabetes mellitus, uremia, etc. (2) Neurogenic urinary frequency: frequent urination and less urine volume each time, mostly seen in central and peripheral neuropathy, such as hysteria, neurogenic bladder. (3) Reduced bladder capacity urinary frequency: such as bladder occupation, bladder tuberculosis, etc., manifested as persistent urinary frequency. (4) Periurethral lesions: urethral polyps, parurethral cysts, etc. stimulate the urethral opening to cause urinary frequency. It is recommended that the patient further improve the examination to clarify the cause of the disease, the professional physician for the specific cause of the corresponding treatment.