Gout starts when uric acid builds up in your blood and forms crystals in your joints

Gout happens because your body produces too much uric acid or cannot get rid of it fast enough. Uric acid is a waste product that forms when your body breaks down purines—compounds found in certain foods and created naturally by your cells. Normally your kidneys filter uric acid out through urine. When levels climb too high, needle-shaped crystals of monosodium urate form inside joints. Your immune system treats these crystals as invaders, triggering inflammation, pain, redness, and swelling.

Your feet are the most common target because they are cooler than the rest of your body. Uric acid crystallizes more easily in cooler temperatures, and the big toe joint in particular sits at the end of your circulatory system where blood flow is slowest. This is why gout attacks the big toe in roughly 50 percent of first attacks and returns there repeatedly in people with chronic gout.

Key Takeaways

  • Gout develops when uric acid levels in your blood stay too high, either because your body makes too much or your kidneys do not filter enough.
  • Your feet are most vulnerable because they are cooler than other body parts, and cooler joints favor crystal formation.
  • Diet, alcohol, certain medications, and kidney function all influence whether your uric acid level stays in the safe range.
  • A single gout attack does not mean you have chronic gout—some people have one episode and never another, while others develop a pattern of recurring attacks.
  • Lowering your uric acid level through medication or lifestyle changes can prevent future attacks, but the process takes weeks to months.

Why your kidneys may not be clearing uric acid properly

Your kidneys do most of the work removing uric acid from your body. In roughly 90 percent of gout cases, the problem is not that your body makes too much uric acid—it is that your kidneys are not excreting enough. This can happen for several reasons: chronic kidney disease, high blood pressure, dehydration, or simply the way your kidneys are built genetically.

Certain medications also interfere with kidney function. Diuretics (water pills) used for high blood pressure or heart disease reduce urine output, which means less uric acid leaves your body. Low-dose aspirin, commonly taken for heart protection, can also slow uric acid excretion. If you take any of these medications and develop gout, your doctor may switch you to an alternative that does not raise uric acid levels.

Dehydration concentrates uric acid in your blood. When you drink less water, your kidneys have less fluid to work with, so uric acid stays in higher concentration. This is why gout attacks sometimes follow a period of illness with fever or diarrhea, or happen after a night of heavy drinking without enough water.

How diet pushes uric acid levels higher

Purines come from two sources: your cells break them down constantly, and you also consume them in food. Red meat, organ meats like liver, and certain seafood—especially anchovies, sardines, and shellfish—are high in purines. Beer is particularly problematic because it contains purines and also interferes with kidney function. High-fructose corn syrup and regular soda have been linked to higher gout risk in research studies, possibly because fructose increases uric acid production.

Not everyone who eats purine-rich foods develops gout. Your genetic makeup determines how much uric acid your body produces and how efficiently your kidneys clear it. Someone with efficient kidney function can eat red meat regularly without problems. Someone with reduced kidney function or a genetic tendency toward high uric acid may develop gout from the same diet.

Rapid weight loss can also trigger an attack. When you lose weight quickly, your body breaks down tissue faster, releasing more purines into your bloodstream. This is why gout sometimes appears during or just after a strict diet or illness that causes weight loss.

Conditions and medications that raise your gout risk

Certain health conditions make gout more likely. Chronic kidney disease reduces your kidneys' ability to filter uric acid. High blood pressure, obesity, and metabolic syndrome all correlate with higher uric acid levels. Type 2 diabetes increases risk partly through kidney effects and partly through increased uric acid production. Heart disease and stroke survivors often take medications that raise uric acid as a side effect.

Beyond diuretics and low-dose aspirin, other medications can trigger gout. Immunosuppressants taken after organ transplant, some cancer medications, and tuberculosis drugs can all raise uric acid. If you develop gout after starting a new medication, tell your doctor—switching to an alternative may prevent future attacks without stopping the medication you need.

Men develop gout more often than women, and the risk rises with age. Women's risk increases sharply after menopause, when estrogen levels drop. Estrogen helps kidneys excrete uric acid, which is why premenopausal women rarely develop gout.

Why your big toe is gout's favorite target

The big toe joint bears weight with every step and has less blood flow than joints higher up in your body. Lower temperature and slower circulation both favor crystal formation. The joint also experiences more mechanical stress, which may make it more vulnerable to inflammation once crystals form.

Gout can attack other joints—the ankle, knee, wrist, elbow, and fingers—but the big toe remains the most common site. When gout becomes chronic and uric acid stays elevated over months or years, attacks may spread to multiple joints. Some people develop tophi, which are deposits of uric acid crystals that form under the skin, often on the ears or fingers.

The difference between one attack and chronic gout

A single gout attack does not automatically mean you have chronic gout. About 50 percent of people who have one attack never have another. Your uric acid level may have spiked temporarily due to diet, dehydration, or a medication change, then returned to normal on its own.

Chronic gout develops when your uric acid level stays elevated over time. If you have had two or more attacks, or if blood tests show your uric acid level is consistently above 6.8 mg/dL (the point at which crystals form), your doctor may recommend long-term medication to lower uric acid. The goal is to keep your level below 6 mg/dL to prevent crystal formation and allow existing crystals to dissolve.

The time between attacks varies widely. Some people have attacks months or years apart. Others, especially without treatment, may have several attacks per year. Each attack typically lasts days to weeks if untreated, though anti-inflammatory medication can shorten it to hours or a few days.

What happens during an acute attack

When uric acid crystals form in a joint, white blood cells rush to the area and try to engulf them. This immune response releases chemicals that cause intense inflammation. An acute gout attack usually starts suddenly—often at night or early morning—with severe pain, redness, warmth, and swelling in the affected joint.

The pain peaks within 24 to 48 hours and gradually subsides over days to weeks, even without treatment. Anti-inflammatory medications like indomethacin, naproxen, or colchicine can reduce pain and shorten the attack if started early. Corticosteroids work for people who cannot take NSAIDs.

Between attacks, the joint may feel completely normal. This is why some people delay seeking treatment—they assume the problem has resolved. However, uric acid crystals may still be present in the joint even when you have no symptoms, setting the stage for the next attack.

Frequently Asked Questions

Can gout move from one joint to another?

Yes. In a single attack, gout can spread to multiple joints over several days. In chronic gout, different joints may be affected in different attacks. The big toe remains most common, but gout can attack your ankles, knees, wrists, and fingers as your uric acid level stays elevated.

Does gout mean I have kidney disease?

Not necessarily. Many people with gout have normal kidney function—their kidneys simply excrete uric acid less efficiently due to genetics. However, chronic gout and high uric acid levels can damage your kidneys over time, so your doctor may test your kidney function if you develop gout.

Why did I get gout after eating a big steak dinner?

Red meat is high in purines, which your body converts to uric acid. A single large purine-rich meal can raise your uric acid level enough to trigger an attack if you are already at risk. Alcohol, especially beer, consumed at the same meal makes this more likely because it slows uric acid excretion.

If I lose weight, will my gout go away?

Weight loss can lower your uric acid level and reduce gout attacks over time, but rapid weight loss can actually trigger an attack. Gradual weight loss through diet and exercise is more effective than crash dieting. If you have chronic gout, your doctor may recommend medication to keep uric acid low while you lose weight.

Is gout hereditary?

Gout runs in families because the genes that control how your kidneys handle uric acid are inherited. Having a parent or sibling with gout increases your risk, but it does not may provide you will develop it. Diet, medications, and other health conditions also play major roles.