I have been experiencing frequent urination issue and mild continuous pain in bladder area(it comes and goes ). I don't feel any burning sensation during urination. Even I drink little water I urine after few minutes and it is really uncomfortable if I am in a situation where I can't find a toilet to urinate . I used to drink around 2-3 liter water now I cannot drink even 1 liter per day because of this issue. What might be the issue. Any comments are much appreciated.