Urinating a lot without drinking water may be due to urinary tract infections, cystitis, endocrine system diseases and so on. 1. Urinary tract infection: urinary tract infection is mainly manifested as urinary symptoms, such as frequent urination, urinary urgency, painful urination, and even nocturia. There may be changes in the character of urine, such as urine becomes turbid, or even pus discharge, hematuria and so on. 2. Cystitis: cystitis is mostly seen in female patients, clinical manifestations of frequent urination, urinary urgency, urinary pain, urinary incontinence can occur in severe cases, there may also be no water but the symptoms of urination. 3. Endocrine system diseases: endocrine diseases such as diabetes mellitus, uremia may also cause excessive urination, usually accompanied by symptoms of endocrine disorders. It may also be caused by other reasons, and patients are advised to go to the hospital in time.