3-4 am always woke up by the urine may be due to drink too much water before going to bed, there may also be due to diabetes, prostate hyperplasia. 1. Physiological factors: If you drink too much water before going to bed at night, it is possible to cause people to appear in the morning 3-4 am always woke up by the performance of urine, this is a normal phenomenon, do not need to worry too much, will be drinking water ahead of time, avoid drinking water before bedtime can be. 2. Diabetes: diabetes is a disease caused by insufficient insulin secretion or defective insulin action, the disease can also lead to patients with 3-4 a.m. always woke up by the symptoms of urine, the patient may appear to drink, eat more, easy to starve, weight loss symptoms. 3. Prostatic hyperplasia: prostatic hyperplasia is a disease of epithelial and mesenchymal hyperplasia of the prostate, the disease can lead to prostate compression of prostate urethra or bladder urethral orifice, which can make the patient always wake up at 3-4 a.m. to urinate, the patient can also appear urinary frequency, urinary difficulties, urinary retention and other symptoms. Always waking up in the morning with urine may also be caused by other factors. After eliminating physiological factors, if the symptoms continue to be unrelieved, it is recommended to go to a regular hospital in a timely manner to identify the cause and ask the doctor to deal with it.