Call your health care provider right away if you feel constant, dull, one-sided pain in your back or side. Ask for a same-day appointment if you also:

• Have fever, body aches and fatigue.
• Had a recent urinary tract infection.
• Feel pain when you pee.
• See blood in your urine.
• Have an upset stomach or vomiting.

Get emergency care if you have sudden, serious kidney pain, with or without blood in your urine.