What tests are needed if gout is suspected?

Recently, I’ve frequently noticed redness, swelling, and pain in my knee joint—even though I haven’t engaged in any strenuous physical activity—leading me to suspect a gout flare-up. So, what tests are needed if gout is suspected?

What Tests Are Required When Gout Is Suspected?

To diagnose gout definitively, joint aspiration and polarized light microscopy are required to identify monosodium urate (MSU) crystals. According to clinical guidelines, synovial fluid crystal analysis—or aspiration of suspected tophi—should be performed for every patient with suspected gout. In the absence of such testing, a diagnosis based solely on clinical symptoms can only be termed a “clinical diagnosis of gout.”

Patients with gout typically present with acute monoarthritis affecting the foot or ankle—especially the first metatarsophalangeal (MTP) joint—characterized by joint redness, swelling, warmth, and pain. A diagnosis should also be considered in individuals with a history of similar episodes of acute arthritis, sudden onset of joint swelling and pain within 24 hours, or in male patients with cardiovascular disease or hyperuricemia. All patients diagnosed with gout should undergo screening for chronic risk factors associated with hyperuricemia, including assessment for modifiable causes.

Additionally, a comprehensive evaluation of comorbid conditions is essential for all gout patients—including obesity, hypertension, heart failure, diabetes, and hyperlipidemia. Gout is a chronic metabolic disorder caused by impaired purine metabolism, resulting in elevated serum uric acid levels. Once hyperuricemia is detected, uric acid–lowering therapy should be initiated promptly. Effective control of hyperuricemia prevents gout flares. We hope this information is helpful!