Gout develops in your feet when uric acid in your blood rises high enough to form tiny, sharp crystals that settle into your foot joints. This typically happens when blood uric acid exceeds 6.8 mg/dL, the point at which uric acid can no longer stay dissolved and begins to crystallize. Your feet, especially the big toe, are the most common target: about 92% of gout attacks strike the lower extremities, and roughly 50% of first attacks hit the base of the big toe. Ninety percent of gout patients will experience at least one attack there over the course of the disease.
How Uric Acid Builds Up
Uric acid is a waste product your body creates when it breaks down purines, compounds found naturally in your cells and in certain foods. Normally, uric acid dissolves in your blood, passes through your kidneys, and leaves your body in urine. Gout starts when that system falls out of balance: either your body produces too much uric acid, your kidneys don’t flush enough of it out, or both.
When uric acid concentration climbs past the saturation point, it forms needle-shaped crystals called monosodium urate (MSU) crystals. These crystals deposit in and around joints, where they damage the lining of the joint and trigger an intense inflammatory response. Your immune cells swarm the crystals, releasing signaling molecules that cause the redness, swelling, heat, and pain of a gout attack.
Why Your Feet Are the Primary Target
Uric acid crystals don’t form equally in every joint. They strongly favor the feet, ankles, and knees for a few reasons. The joints farthest from your core, like your big toe, run at lower temperatures than your trunk. Cooler temperatures reduce the solubility of uric acid, making crystals more likely to form. Those distal joints also tend to have slightly lower blood pH, which further encourages crystallization.
Gravity plays a role too. Uric acid can concentrate in the fluid of lower-extremity joints over the course of a day, especially if you’re on your feet. The big toe joint (first metatarsophalangeal joint) bears enormous pressure during walking, and repetitive microtrauma may make it more hospitable to crystal deposits. The ankle, midfoot, and knee are also common sites.
What Raises Your Uric Acid
Several overlapping factors push uric acid levels into the danger zone. Some you can control, others you can’t.
Diet
Foods high in purines directly increase uric acid production. The biggest contributors are organ meats (liver, kidney, sweetbreads), red meat, and certain seafood like shellfish, anchovies, and sardines. Fructose is a less obvious culprit. When your body processes fructose, unlike other sugars, it rapidly depletes energy molecules in your cells in a way that generates extra uric acid as a byproduct. The rising prevalence of gout in developed countries has tracked closely with increased consumption of high-fructose corn syrup and sugar-sweetened beverages.
Alcohol raises uric acid through multiple mechanisms. Beer is the worst offender because it’s high in purines and also impairs your kidneys’ ability to clear uric acid. Liquor carries a moderate risk. Wine appears to have a smaller effect, though heavy consumption of any alcohol increases risk.
Genetics
Your genes have a major influence on how efficiently your kidneys handle uric acid. Large genetic studies have identified multiple genes involved in uric acid transport in the kidneys. Two of the most important are genes that code for proteins responsible for moving uric acid out of your blood and into your urine. Specific variants in these genes are significantly more common in people with gout. If your parents or siblings have gout, your own risk is substantially higher regardless of diet.
Medications
Certain common drugs raise uric acid as a side effect. Diuretics (water pills), frequently prescribed for high blood pressure and heart failure, are the most widely recognized culprit. They increase uric acid reabsorption in the kidneys, meaning less gets excreted. Loop diuretics carry a higher risk than thiazide diuretics. Low-dose aspirin and immunosuppressant drugs used after organ transplants can also elevate uric acid levels. If you’re taking any of these and developing gout symptoms, it’s worth discussing alternatives with your prescriber.
Other Health Conditions
Gout doesn’t exist in isolation. High uric acid is closely linked to a cluster of metabolic problems, including obesity, high blood pressure, high triglycerides, type 2 diabetes, metabolic syndrome, and chronic kidney disease. Kidney disease is particularly relevant because impaired kidneys can’t clear uric acid as effectively, creating a feedback loop. Being overweight increases uric acid production and decreases excretion simultaneously, which is why weight loss is one of the most effective lifestyle changes for preventing attacks.
What a Gout Attack Feels Like
A first gout attack is often dramatic enough that people think something is broken. It typically strikes at night or in the early morning, when cortisol levels are low. Pain may build over a few hours or wake you suddenly from sleep. Within 12 to 24 hours, the joint reaches peak inflammation: visibly red, swollen, hot, and so tender that even the weight of a bedsheet can be unbearable. Some people develop fever, fatigue, and general malaise alongside the joint symptoms. The redness and swelling can extend beyond the joint itself, sometimes mimicking a skin infection.
Without any treatment, a first attack typically resolves on its own within 3 to 14 days. That resolution can be misleading. The underlying uric acid problem hasn’t gone away, and crystals continue to accumulate silently between attacks.
The Four Stages of Gout
Gout is a chronic disease that progresses through distinct phases. Understanding where you are helps explain what’s happening in your feet even when they feel fine.
Asymptomatic hyperuricemia is the silent first stage. Your uric acid is elevated, but you’ve never had an attack. Most people in this stage never develop gout, but the higher the level, the greater the risk. This phase can last years or even decades.
Acute gout attacks mark the second stage. These are the intense, painful flares described above. Early on, attacks tend to affect a single joint, usually in the foot. They may happen once and not return for months or years.
Intercritical periods are the quiet stretches between attacks. You feel normal, but crystal deposition and low-grade inflammation continue in the background. Over time, these pain-free intervals shorten.
Chronic tophaceous gout is the advanced stage. Without management, attacks become more frequent, less intense, and start involving multiple joints. Hard lumps of urate crystals called tophi can form under the skin near joints, on the ears, or along tendons. This stage can cause permanent joint damage, but it takes years of untreated disease to reach this point.
Who Gets Gout Most Often
Gout is far more common in men than women. In populations over 70, men develop gout at roughly two to three times the rate of women. Estrogen helps the kidneys excrete uric acid, which is why gout in women is rare before menopause and increases sharply after it. Prevalence also climbs with age: among people 85 and older, the global rate reaches about 3,727 per 100,000. Regions like Australasia and North America have some of the highest rates in the world, with prevalence in older men exceeding 13,000 per 100,000 in parts of Australasia.
Beyond age and sex, the strongest predictors of gout are a family history, elevated BMI, heavy alcohol use, a diet rich in red meat and sugar-sweetened drinks, chronic kidney disease, and use of diuretics. Many people who develop gout have several of these factors working together.