The fact that you have to drink water and then urinate may be caused by physiological factors such as nervousness, drinking too much water, or it may be caused by diseases such as overactive bladder, prostatitis, and so on. 1. Physiological factors: drinking water soon after the urine is considered to be physiological factors, such as mental stress or drinking too much water, are normal. 2. Overactive bladder syndrome: The cause of overactive bladder syndrome is not yet clear, mostly related to the urethral muscle, urinary center, bladder sensory nerve and other factors. Patients will experience symptoms such as urinary urgency, urinary frequency, nocturia, etc. 3. prostatitis: prostatitis patients will appear urinary frequency, urinary urgency, urethral burning pain and other symptoms, there will be a drink of water soon after the case of urination, the cause is mainly related to the infection, followed by irregular sexual life, unclean sexual intercourse, and other reasons will also induce prostatitis. There are many reasons for drinking water and urinating soon after drinking it. After eliminating physiological factors, patients are advised to consult a doctor for a clear diagnosis.