Hello sir, I have a problem of frequent urination. I generally urinate around 15 times a day. Whenever I drink water, there is an urge to urinate. Also, many times even after urinating, I feel that it is not clear and that I may need to go once more to the washroom. This has been persistent for last 4 years. At first, I thought that it was nothing to be serious about but now the frequency has increased and I am worried.