Gout Affecting the Knee

Gout is a type of arthritis that can affect the knee joint, causing sudden and severe pain, swelling, redness, and warmth in the area. Gout often occurs in the knee because the knee is a weight-bearing joint that can be more prone to these problems. Gout develops when there is too much uric acid in the body, which forms sharp crystals in the joint. The body has an intense inflammatory response to these crystals creating many of the symptoms seen in gout. Uric acid is formed by the breakdown of purines in the kidneys. Purine molecules are found in DNA and RNA and are common throughout the body. People who are more likely to get gout include those who eat a lot of foods high in purines (like red meat and seafood), drink alcohol, or have certain health conditions like kidney problems, obesity, or diabetes. It’s also more common in men and older adults.

Diagnosing Gout in the Knee

Gout affecting the knee is diagnosed through a combination of methods. First, a doctor will ask about the patient’s symptoms, like pain, swelling, and redness in the knee. They may also take a blood test to check for high levels of uric acid, which is a common cause of gout. If the blood test shows elevated uric acid, the doctor might use a needle to take a small sample of fluid from the knee joint, called joint aspiration. This fluid is then examined under a microscope to look for tiny crystals of uric acid, which are a clear sign of gout. In some cases, an X-ray or ultrasound may also be used to check for damage in the joint or confirm the diagnosis.

Treating Gout affecting the Knee

Gout affecting the knee is usually treated with medications to reduce pain and lower uric acid levels in the body. To relieve pain and swelling, doctors often prescribe nonsteroidal anti-inflammatory drugs (NSAIDs), like ibuprofen, or colchicine, which helps reduce inflammation. In some cases, corticosteroids may be injected into the knee to quickly reduce swelling. To prevent future gout attacks, doctors may recommend medications that help lower uric acid levels, such as allopurinol. Along with medication, lifestyle changes like drinking plenty of water, avoiding alcohol and foods high in purines (like red meat and shellfish), and maintaining a healthy weight can help manage gout and prevent flare-ups.

Edited by Amari Eubanks and Stephen Pinney MD June 14th, 2025