The old desire to urinate may be caused by physiological reasons such as drinking a lot of water, after drinking beer, or by disease factors such as cystitis, overactive bladder, diabetes and other factors. 1. Physiological reasons: Physiological reasons such as drinking a lot of water, after drinking beer, may make the plasma colloid osmotic pressure lower, the kidneys absorb more water and form more urine, thus the symptoms of urinating a lot and wanting to urinate all the time. 2. Pathologic causes: (1) cystitis: when inflammation of the bladder occurs, the bladder mucosa becomes congested and edematous, and bladder irritation may develop, resulting in discomfort such as frequent urination, urgency, and painful urination. (2) Overactive bladder: When the bladder muscle contraction dysfunction occurs, the bladder muscle contraction is excessive and frequent, and the symptom of frequent urination may also occur. (3) Diabetes mellitus: diabetic patients tend to have high blood glucose levels, which may cause osmotic diuresis, increased urine output, and an increase in the number of water intake, resulting in the phenomenon of always wanting to urinate. Old want to urinate may also be caused by bladder stones, urolithiasis, anxiety, etc. When the above symptoms occur repeatedly, you should consult a doctor in time, improve the examination to clarify the cause of the disease, and then give the targeted treatment or treatment under the guidance of the doctor.