One day urinate 13 times belongs to urinary frequency, but whether it is normal and the cause of urinary frequency is related, if it is physiological reasons such as drinking a lot of water, it is normal, if it is caused by pathological factors such as acute cystitis, bladder stones and other reasons, it is not normal. 1. Physiological reasons: If you drink a lot of water, eat watermelon, drink beer, etc., due to the increase in the amount of water intake, through the regulation of the kidneys and filtration, so that the volume of urine increases, the number of urination will increase, 13 times a day urination is a normal situation. 2. Pathologic causes: (1) acute cystitis: due to the inflammatory factors in the bladder to stimulate the bladder mucosa, resulting in bladder mucosal congestion and edema, stimulation, causing the bladder forced urethral muscle contraction, resulting in the symptoms of frequent urination. (2) Bladder stones: Most of the patients will have the symptoms of frequent urination and urgency, because the repeated movement of stones in the bladder has caused a reduction in the effective capacity of the bladder or damage to the wall of the bladder as well as the bladder mucosa, leading to an abnormal sensation in the bladder. Urinating 13 times may also be seen in other diseases such as urethritis, bladder tumor, etc. It is recommended to go to the hospital to clarify the cause of the disease.