Frequent urination may be caused by drinking too much water, or it may be caused by cystitis, prostate enlargement, diabetes and other diseases. 1. Drinking too much water: If the patient drinks a lot of water every day, resulting in increased urine production, there will be an increase in the number of times of urination, the amount of urination will also increase. It is a normal physiological phenomenon, will not cause adverse effects on the body, usually control the amount of water can be. 2. Cystitis: Cystitis is caused by bacterial infections such as Escherichia coli and Staphylococcus pyogenes. Cystitis patients will appear frequent urination, urinary urgency, urinary pain, burning sensation in the urethra and other symptoms, serious patients will also be accompanied by urge incontinence, cloudy urine, hematuria and so on. 3. Prostatic hyperplasia: The abnormalities of androgen, the balance of prostate cell proliferation and apoptosis, and the promotion and inhibition of growth factors in the prostate may trigger prostatic hyperplasia in patients. It will cause patients to urinate obstacles, frequent urination, urinary urgency, urination difficulties and other symptoms. 4. Diabetes mellitus: Diabetes mellitus may be caused by genetic, autoimmune deficiency and other factors. Patients may experience symptoms such as excessive drinking, excessive urination, excessive eating, weight loss, etc., which is manifested by frequent urination. There may be other reasons for frequent urination, and prompt medical attention is recommended.