Pain in the left flank area: what to know

The flank is the side of the body between the lower ribs and the hip. Pain that follows lifting, twisting, coughing, or pressing the area can fit a muscle or rib problem. Deep, cramping pain that comes in waves may occur with kidney stones. A kidney infection may present with flank discomfort together with fever, chills, nausea, or urinary changes. Burning urination, urgency, or frequent small trips to the toilet can occur with a urinary tract infection, although flank pain can signal that infection has moved higher in the urinary system. Digestive or spinal problems can also be felt in this region.

A symptom alone cannot identify the cause. Note whether the pain is steady or intermittent, how it began, and whether movement or meals alter it.

Rest from strenuous activity and avoid movements that clearly worsen the pain. Drink fluids normally unless a clinician has told you to restrict them, and do not force large amounts if you feel sick. Keep track of temperature, urine appearance, urinary discomfort, bowel symptoms, and any pain that travels toward the groin. A pharmacist or clinician can help you choose a suitable pain reliever, especially if you have kidney disease, stomach ulcers, take blood thinners, or are pregnant. Arrange a medical assessment if the pain persists, returns, or is accompanied by urinary symptoms.

Seek urgent medical care for severe or rapidly worsening pain, fever with flank pain, repeated vomiting, faintness, confusion, blood in the urine, inability to pass urine, or marked tenderness. Emergency help is appropriate if flank pain occurs with chest pain, severe shortness of breath, or collapse. These features can indicate a problem needing prompt examination and testing.

Ask: Could this be muscular, urinary, kidney-related, or digestive? Which symptoms should prompt same-day care? Do I need a urine test, blood test, or scan? Which medicines are suitable with my current conditions and treatments?