Weak urination stream when I wake up. How come?

Hard to know? This would depend on your age and any pre-existing problems you may have. Nocturnal arousals may engorge the prostate and genitals making a weak stream. An enlarged prostate and certain medications could be the cause. It this clears through the day and is not a problem elsewise, then just observe. If problems or concerns beyond this, then see your pcp or urologist.

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Weak urination stream when I wake up normal at 20?

Stretched bladder? Overnight the bladder is full of urine and if the man wakes up with a full erection, this decreases the ability to empty the bladder. Other causes of bladder emptying problems and decreased stream require a medical evaluation with a urologist to diagnose. Read more...