Flank Pain: Common Causes and Diagnostic Tests

Flank pain, also known as loin pain, is discomfort or pain located on the side of your body between the lower ribs and the hips. It can be a symptom of various conditions, ranging from mild to serious. Understanding the potential causes and the tests used to diagnose them can help you and your healthcare provider determine the best course of action.

What is flank pain?

Flank pain refers to discomfort or aching in the area on the side of the body between the ribs and the hip. This area encompasses the back and side of the abdomen. Flank pain can be sharp, dull, or cramping and may be constant or intermittent. It is important to pay attention to the nature and duration of the pain, as this information can assist in diagnosing the underlying cause.

Common causes of flank pain

Flank pain can arise from various conditions, including:

• Kidney stones: These are hard mineral deposits that form in the kidneys and can cause severe pain when they move or block the urinary tract.
• Urinary tract infections (UTIs): Infections in the bladder or kidneys can lead to flank pain, often accompanied by urinary symptoms like burning or urgency.
• Muscle strain: Overuse or injury to the muscles in the back can cause pain in the flank region.
• Kidney infections (pyelonephritis): A serious infection of the kidneys that can cause fever, chills, and flank pain.
• Gallstones: These can cause pain in the right flank if they block the bile ducts.
• Appendicitis: Although typically associated with lower abdominal pain, it can sometimes present as flank pain.

Diagnostic tests for flank pain

To determine the cause of flank pain, healthcare providers may use a variety of tests, including:

• Urinalysis: This test examines the urine for signs of infection or the presence of blood, which can indicate kidney stones or a UTI.
• Imaging tests: Ultrasound, CT scans, or X-rays can help visualize the kidneys, urinary tract, and surrounding organs to identify stones, infections, or other abnormalities.
• Blood tests: These can check for signs of infection, kidney function, and other indicators of underlying conditions.
• Physical examination: A healthcare provider may perform a physical exam to assess the area of pain and look for other signs of illness.

Frequently asked questions

What does flank pain feel like? Flank pain can vary from a dull ache to a sharp, stabbing sensation. It may be constant or come and go, and it might be felt on one or both sides of the body.

Can dehydration cause flank pain? Dehydration can lead to kidney stones, which may cause flank pain. Staying hydrated helps prevent stone formation.

Does flank pain always indicate a kidney problem? No, flank pain can result from various issues, including muscle strain or gallstones. It is important to consider other symptoms and consult a healthcare provider for an accurate diagnosis.

When to see a doctor

You should consult a doctor if you experience severe flank pain, especially if it is accompanied by fever, chills, nausea, vomiting, or changes in urination. These symptoms could indicate a serious condition requiring medical attention. Additionally, if flank pain persists or worsens over time, it is advisable to seek medical advice.

Remember, this information is intended to be informative and not a substitute for professional medical advice. Always consult with your healthcare provider for decisions regarding your health.