Gout is a form of arthritis caused by a buildup of uric acid crystals in your joints. It strikes suddenly, often in the middle of the night, with intense pain, swelling, and redness that can make even the weight of a bedsheet feel unbearable. About 3.9% of adults in the United States have gout, making it one of the most common inflammatory joint conditions.
How Gout Develops in Your Body
Your body produces uric acid as a waste product when it breaks down substances called purines, which are found naturally in your body and in certain foods. Normally, uric acid dissolves in your blood, passes through your kidneys, and leaves your body in urine. But when your body produces too much uric acid or your kidneys don’t filter enough of it out, levels in the blood rise above the saturation point of 6.8 mg/dL. At that point, uric acid can form sharp, needle-like crystals that collect in and around your joints.
These crystals tend to settle in cooler parts of your body, which is why the big toe is the single most common site for a gout attack. The foot, ankle, and knee are also frequent targets. When the crystals are released into the fluid surrounding the joint, your immune system treats them as a threat and floods the area with white blood cells, triggering the intense inflammation, pain, and swelling that define a gout flare.
What a Gout Attack Feels Like
The hallmark of gout is a sudden, explosive onset of joint pain. Many people describe their first attack as waking up feeling like their big toe is on fire. The pain is typically most severe within the first 4 to 12 hours. During this peak, the affected joint becomes visibly swollen, warm to the touch, and red or purplish in color. The tenderness can be so extreme that contact with clothing or bedding is painful.
After the worst of the pain subsides, lingering discomfort and stiffness can last from a few days to a few weeks. You may also notice that the joint doesn’t move as freely as it normally does. Early on, gout usually affects only one joint at a time, but repeated flares can eventually involve multiple joints.
The Four Stages of Gout
Gout doesn’t appear out of nowhere. It progresses through distinct phases, and understanding where you are in that progression helps explain what you’re experiencing and what to expect next.
Asymptomatic Hyperuricemia
In this earliest stage, uric acid levels in the blood are elevated, but you have no joint pain, swelling, or redness. Crystals may already be accumulating silently in your joints. Most people in this stage have no idea anything is happening, because there are no outward symptoms. Not everyone with high uric acid will go on to develop gout, but the risk increases the longer levels stay elevated.
Acute Gout
This is the first actual flare. Crystals that have been collecting in a joint are released into the surrounding fluid, setting off a powerful inflammatory response. Pain, redness, and swelling develop rapidly, most often in the big toe, foot, ankle, or knee. Flares can be triggered by specific events like a heavy meal, alcohol consumption, dehydration, or illness.
Intercritical Gout
After a flare resolves, you enter a quiet period with no active symptoms. This in-between stage can last months or even years before the next attack. It’s tempting to assume the problem has gone away, but uric acid crystals are still present in the joints. Nearly all gout patients cycle through flares and quiet periods, with attacks typically becoming more frequent over time if uric acid levels aren’t managed.
Chronic Tophaceous Gout
After years of uncontrolled gout, some people develop a chronic form where joint pain is present nearly all the time. This stage is marked by the formation of tophi: visible, chalky nodules of uric acid crystals that grow in and around joints, tendons, and other soft tissues. They most commonly appear near the big toe or at the elbow, but can also form in unexpected places like the ears, nose, or even the kidneys. Tophi can erode bone, damage cartilage, and permanently limit joint movement. In rare cases, they compress nerves or interfere with organ function. This level of damage is often irreversible.
Common Triggers and Risk Factors
Certain foods and drinks are well-established gout triggers because they’re high in purines or because they interfere with how your kidneys process uric acid. The most common culprits include:
- Sugary drinks and sweets: Table sugar is half fructose, which breaks down directly into uric acid. Sodas, fruit juices with added sugar, and candy are all triggers.
- High-fructose corn syrup: A concentrated source of fructose found in many processed foods and beverages.
- Alcohol: Even alcoholic drinks that aren’t high in purines can trigger flares because alcohol prevents your kidneys from clearing uric acid efficiently, causing it to accumulate.
- Organ meats: Liver, kidneys, sweetbreads, and tripe are among the highest-purine foods.
- Certain seafood: Herring, scallops, mussels, codfish, tuna, trout, and haddock are notable sources of purines.
- Game meats: Goose, veal, and venison are particularly high in purines.
- Gravy and meat sauces: These concentrate the purines from the meat they’re made from.
- Yeast and yeast extract: Found in beer, nutritional yeast supplements, and some savory spreads.
Beyond diet, other factors raise your risk. Men develop gout more often than women, though women’s risk increases after menopause. Obesity, high blood pressure, kidney disease, and a family history of gout all contribute. Dehydration and certain medications that affect kidney function can also push uric acid levels past the tipping point.
How Gout Is Diagnosed
The most definitive way to confirm gout is by drawing fluid from the affected joint and examining it under a microscope. If uric acid crystals are visible in the fluid, that alone confirms the diagnosis with no further testing needed. When joint fluid can’t be obtained, doctors use a combination of clinical signs, blood tests for uric acid levels, and imaging.
Ultrasound can reveal a characteristic pattern called a “double-contour sign,” where uric acid crystals coat the surface of joint cartilage. A specialized CT scan can detect uric acid deposits at or around joints by color-coding them in the image. Standard X-rays can show bone erosion with a distinctive appearance: cortical breaks with hardened edges and an overhanging lip of bone, which is specific to gout-related damage. Interestingly, a very low uric acid level in the blood actually counts against a gout diagnosis, since the disease depends on sustained uric acid excess.
What Happens Without Treatment
Left unmanaged, gout follows a predictable pattern of escalation. Early on, flares may happen once a year or less, with long pain-free stretches in between. Over time, the gaps between attacks shrink. Flares become more severe, last longer, and start affecting additional joints. Eventually, the chronic tophaceous stage can set in, bringing constant low-grade pain and visible deposits that damage bone and cartilage permanently.
Kidney stones are another risk. Uric acid can crystallize in the kidneys just as it does in joints, forming stones that cause sharp flank pain and urinary problems. Keeping uric acid levels under control prevents both joint damage and kidney complications, which is why treatment focuses on long-term uric acid reduction rather than just relieving pain during flares.