Gout is actually a type of arthritis, not a separate condition. The confusion is understandable because gout behaves very differently from the two most common forms: osteoarthritis, which comes from joint wear over time, and rheumatoid arthritis, which is an autoimmune disease. Gout is caused by uric acid crystals building up in a joint, triggering sudden, intense inflammation. The differences in cause, symptoms, and treatment are significant enough that the distinction matters for getting the right care.
What Causes Each Type
The three main types of arthritis each damage joints through entirely different mechanisms. Osteoarthritis happens when the cartilage cushioning your joints gradually breaks down over years, usually from aging, repetitive use, or past injuries. Bone eventually grinds against bone, causing stiffness and pain that worsens slowly.
Rheumatoid arthritis is an autoimmune disease. Your immune system mistakenly attacks the lining of your joints, causing chronic inflammation that can erode bone and deform joints over time. It tends to affect matching joints on both sides of the body, like both wrists or both knees.
Gout works differently from both. Your body produces uric acid when it breaks down compounds called purines, found naturally in your body and in certain foods. Normally, uric acid dissolves in your blood, passes through your kidneys, and leaves in your urine. But when levels get too high, uric acid can form sharp, needle-like crystals that lodge in a joint. These crystals trigger an aggressive immune response. When they contact your cells, they activate a cascade of inflammation, including the release of a powerful inflammatory signal called IL-1 beta. The result is sudden, severe swelling and pain that can go from nothing to excruciating within hours.
How the Symptoms Feel Different
The biggest clue is how the pain arrives. A gout flare typically hits fast, often overnight, and the affected joint becomes hot, swollen, red, and so tender that even the weight of a bedsheet can be unbearable. The big toe is the classic first target, though gout can also strike the foot, ankle, or knee. These attacks come and go. You might have one episode and then feel completely fine for weeks or months before the next one.
Osteoarthritis pain is nearly the opposite in character. It builds gradually over months or years, feels worst after activity or at the end of the day, and tends to affect weight-bearing joints like knees and hips or joints you use heavily, like your hands. You might notice stiffness in the morning that eases up within about 30 minutes of moving around. There’s rarely redness or heat in the joint.
Rheumatoid arthritis can start either suddenly in many joints or creep in gradually. Morning stiffness is a hallmark, but unlike osteoarthritis, it lasts much longer, often more than an hour. It typically affects smaller joints first, like the knuckles and the joints at the base of your fingers, and usually hits the same joints on both sides of the body. Fatigue, low-grade fever, and a general feeling of being unwell often accompany the joint symptoms.
Who Gets Gout
Gout affects roughly 8.3 million Americans, about 4% of the U.S. population, making it at least four times more common than rheumatoid arthritis. It overwhelmingly affects men, who outnumber women by a ratio of 5-to-1 to 10-to-1 depending on age group. About 5.9% of men have gout compared to 2.0% of women. After menopause, though, the gap narrows because estrogen helps the kidneys clear uric acid, and that protection fades.
Black Americans have a somewhat higher prevalence (5.0%) compared to white Americans (4.0%). Osteoarthritis, by contrast, is the most common form of arthritis overall and affects men and women more equally, particularly after age 50. Rheumatoid arthritis is more common in women, roughly two to three times more so than in men.
Gout Triggers Are Uniquely Specific
Unlike osteoarthritis or rheumatoid arthritis, gout flares have identifiable triggers you can often point to. Diet plays a major role. Red meat, organ meats (liver, kidney), and certain seafood like anchovies, sardines, mackerel, and shellfish are all high in purines. Organ meats are by far the worst offenders, with some containing over 1,000 mg of purines per 100 grams.
Alcohol is a well-established trigger. Compared to people who don’t drink, having more than two servings of any type of alcohol increases gout flare risk by about 51%. Beer is worse than liquor or wine because it contains purines of its own. Sugary drinks sweetened with high-fructose corn syrup also raise risk. People who drink two or more servings per day have a 62% higher rate of developing gout than those who drink less than one.
Dehydration matters too. Drinking more than eight glasses of water a day has been associated with nearly a 50% reduction in flare risk compared to drinking very little. Certain medications can raise uric acid levels, particularly diuretics (water pills), which increase gout risk by 1.4 to 2.3 times depending on the type. Surgery, illness, joint injuries, and even temperature changes can also set off a flare.
Osteoarthritis and rheumatoid arthritis don’t have these kinds of acute triggers. Osteoarthritis worsens with overuse and weight gain. Rheumatoid arthritis flares can follow stress or infections, but the connection is less predictable and less tied to specific foods or drinks.
How Gout Progresses in Stages
Gout follows a distinctive four-stage pattern that sets it apart from other forms of arthritis. In the first stage, uric acid levels are elevated but you have no symptoms. You wouldn’t know anything was wrong without a blood test.
The second stage is the first acute flare: sudden, severe joint pain, usually in the big toe. The third stage is the quiet period between flares. You feel completely normal, which can make it tempting to ignore the condition. But uric acid crystals may still be accumulating.
If gout goes untreated for years, it can progress to the fourth stage, called tophaceous gout. At this point, uric acid deposits form visible lumps (tophi) under the skin, often near the big toe or elbow, and joint pain becomes more or less constant. This stage takes many years of uncontrolled gout to reach.
This episodic, flare-and-remission pattern is very different from osteoarthritis, which never fully remits and progresses steadily, or rheumatoid arthritis, which can fluctuate but causes ongoing joint damage even during quieter periods if untreated.
How Doctors Tell Them Apart
The gold standard for diagnosing gout is examining fluid drawn from the affected joint under a special polarized light microscope. Uric acid crystals are needle-shaped and bend light in a specific way (called negative birefringence) that’s unmistakable. Finding these crystals inside immune cells in the joint fluid is essentially a definitive diagnosis.
Blood tests measuring uric acid levels also help, though they’re not conclusive on their own because some people have high uric acid without gout, and uric acid can temporarily drop during a flare. The formal classification criteria use a scoring system where a serum urate level above 10 mg/dL scores the highest, while a level below 4 mg/dL actually counts against a gout diagnosis.
Osteoarthritis is typically diagnosed through X-rays showing joint space narrowing, bone spurs, and cartilage loss. Rheumatoid arthritis diagnosis relies on blood markers like rheumatoid factor and anti-CCP antibodies, along with imaging showing joint erosion patterns.
Treatment Takes Different Paths
Because the underlying causes differ, treatments are fundamentally different. Gout treatment has two prongs: stopping the acute flare and lowering uric acid long-term to prevent future attacks. Acute flares are treated with anti-inflammatory medications. Long-term management focuses on reducing uric acid production or increasing its excretion, with the goal of dissolving existing crystals and preventing new ones from forming. Dietary changes, like reducing alcohol, red meat, organ meats, and sugary drinks, can meaningfully lower uric acid levels and flare frequency.
Rheumatoid arthritis treatment centers on suppressing the overactive immune system. This involves disease-modifying drugs that slow joint destruction, and in more severe cases, biologic medications that block specific inflammatory signals like TNF-alpha or IL-6. These biologics are not typically used for gout, which targets a different inflammatory pathway (IL-1 beta). Osteoarthritis treatment focuses on pain management, physical therapy, weight loss to reduce joint stress, and eventually joint replacement surgery if the damage becomes severe enough.
The good news about gout, compared to other forms of arthritis, is that it’s one of the most treatable. When uric acid is brought below a target level and kept there, crystals dissolve, flares stop, and tophi shrink. Osteoarthritis damage is permanent, and rheumatoid arthritis requires ongoing immune suppression. Gout, treated properly, can effectively go into long-term remission.