What could be the cause of urination twice each night with no other symptoms?

Nocturia: Nocturia as a primary concern can be from multiple etiologies. Some of the most common include cardiovascular dysfunction (i.e. If you've had a heart attack), drinking too much in the evening, insomnia and overatice bladder (which doesn't bother you during the day), just to name a couple. You should try altering your fluid intake in the evenings and take all "water pills" in the morning.

A few possibilities: In middle-aged or older men, the most likely cause of frequent nighttime urination is an enlarged prostate. The prostate is located below the bladder, and if enlarged, can cause the bladder to not empty completely. This in turn leads to frequent urination. Other possibilities include bladder infections, excess liquids, or more rarely inflammation in the prostate or bladder or a tumor.