Aside from the burning sensation, are there other signs or symptoms present? Urinary tract infection (UTI) may involve the kidneys, ureters, bladder and urethra. This usually presents with: strong, persistent urge to urinate; passing frequent, small amounts of urine; blood in the urine or cloudy, strong-smelling urine.
The presence of flank pain or fever usually points to a kidney infection. While lower abdomen discomfort, fever, and frequent, painful urination are the more specific symptoms of bladder infection. If there are no other signs present in your boyfriend, he may have infection in the urethra or urethritis, since this usually presents with burning sensation during urination. It would be best for him to see a doctor to rule out other causes such as kidney stones or prostatitis. Diagnosis is through urinalysis and treatment of UTI is antibiotics. Drinking plenty of fluids and urinating frequently may also help. Take care and keep us posted.