Thanks for writing to health care magic.
From when are you facing this problem?
If your problem is of short duration then the cause could be urinary tract infection
In such a scenario there will be burning sensation while passing urine along with fever
and frequency and urgency.
If your problem is of a long duration and not associated with other complaints then we should think of other problems like diabetes
etc which can cause such a problem.
In diabetes there will be increased appetite along with increased thirst and increased frequency of urination.
Various other conditions like a overactive bladder
etc can cause such a problem.
Hope this helps.