What is flank pain?
A person with flank pain has discomfort on one side of the back, below the ribcage and above the pelvis. Flank pain is often caused by a muscle strain, but can also be caused by problems with the kidneys, ureters, or bladder. Common causes for flank pain include pyelonephritis, kidney stone, and back strain or sprain.

What are the symptoms of flank pain?
Symptoms of flank pain depend on the underlying cause. Symptoms may include pain that worsens with movement, muscle tenderness, difficulty urinating, pain during urination, red or pink urine, fever, nausea, vomiting, and abdominal pain.

How does the doctor treat flank pain?
Treatment for flank pain depends on underlying cause. Treatment may include hydration, pain medications, and antibiotics.