There are some urine left every time i went to toilet

masterbate twice a week , post masterbation let say few hours later , I went to toliet to release my pee out,I realise urine does not finish, a little urine still stuck at the tip, like drip abit, it will soak my underwear, and cause a "smelly urine smell" when sleeping.My Tip also do feel a little burning, and i feel the urge to urinate, but there's nothing