What Is Gout? Causes, Symptoms, Uric Acid, and What Happens Inside the Body

Many people have heard of gout. Far fewer understand what it actually is. Some people associate gout with rich food, alcohol, or outdated stereotypes. Others first hear about it after waking up with sudden joint pain and searching for answers online.

If you are wondering what gout is, what causes it, and what happens inside the body, you are not alone. The good news is that researchers now understand gout better than ever before. Modern science has transformed gout from a poorly understood condition into one of the best-studied forms of inflammatory arthritis (Dalbeth et al., 2021).

This article explains gout in simple terms while staying grounded in current scientific evidence.

What Is Gout?

Gout is an inflammatory form of arthritis caused by the buildup of monosodium urate crystals in and around joints. These crystals form when uric acid levels remain elevated for long periods of time. When crystals accumulate, the immune system may react to them, triggering inflammation that can lead to:

• Sudden joint pain
• Swelling
• Redness
• Warmth
• Reduced mobility
  

For many people, symptoms appear suddenly and intensely.

A gout flare often develops within hours and may reach peak intensity within a single day (NICE Guideline NG219, 2022).

Why Is the Big Toe So Commonly Affected?

The classic first location for gout is the big toe joint, known medically as podagra. This pattern is remarkably common.

According to NICE, the big toe is the first affected joint in approximately 50% of people with gout and becomes involved at some point in more than 70% of cases (NICE NG219, 2022).

A systematic review and meta-analysis reported a pooled prevalence of 73% for big toe involvement in gout (Stewart et al., 2016).

Researchers continue to study why this joint is particularly vulnerable. Several factors may contribute:

• lower temperatures in the feet
• mechanical stress during walking
• small joint structures
• favorable conditions for crystal formation

Gout Can Affect Other Joints Too

Although the big toe is the most recognized location, gout can affect many different joints. Common sites include:

• feet
• ankles
• knees
• fingers
• wrists
• elbows

Some people experience symptoms in less typical locations, which can make diagnosis more challenging.

What Does Gout Pain in the Big Toe Feel Like?

People often describe gout pain as:

• throbbing
• burning
• sharp
• intense
• Symptoms usually develop quickly.
  

Many gout flares reach their peak intensity within 24 hours (NICE NG219, 2022).

One of the most recognizable features is touch sensitivity. Some people report that wearing a sock or having a bedsheet rest on the joint becomes uncomfortable. Research exploring patient experiences has found that gout can temporarily affect everyday activities
such as walking, climbing stairs, driving, sleeping, and standing for long periods (Stewart et al., 2016).

Why Do Gout Attacks Often Start at Night?

Many gout flares begin during the night or in the early morning hours.
Research reviewed by NICE found that nighttime onset is a common feature of gout (NICE NG219,
2022).

Several factors may contribute:

• Changes in body temperature during sleep
• Overnight fluid shifts
• Conditions that may encourage crystal formation in joints
  

For many people, the experience feels sudden and unexpected. They often describe being awakened by pain that was not present when they went to bed.

Could Something Other Than Gout Cause Big Toe Pain?

Yes. Several conditions can cause pain in the big toe joint.
These include:

• Osteoarthritis
• Hallux rigidus
• Overuse injuries
• Sports injuries
• Bursitis
• Joint infections
  

This is one reason why medical evaluation can be helpful.

Current guidelines emphasize that a red, swollen, painful joint should be assessed carefully, especially when symptoms appear suddenly. In some situations, healthcare professionals may need to rule out
joint infections or other causes of inflammation (NICE NG219, 2022).

How Is Gout Diagnosed?

Doctors usually combine several pieces of information when evaluating gout.

These may include:

• Medical history
• Symptom pattern
• Physical examination
• Blood tests
• Imaging studies
• Joint fluid analysis in selected cases
  

One important point is that gout cannot always be confirmed by a single uric acid test. According to international guidelines, diagnosis is based on the overall clinical picture, and additional
testing may be helpful

Can You Have Gout If Your Uric Acid Level Is Normal?

This surprises many people. During an acute gout flare, blood uric acid levels can temporarily fall into the normal range. For this reason, NICE recommends repeating testing after symptoms have settled if gout is still suspected (NICE NG219, 2022). A normal uric acid level during a flare does not automatically rule out gout.

What Happens Inside the Joint During Gout?

Gout is now recognized as an inflammatory rheumatic disease. The condition develops when monosodium urate crystals accumulate within joints and surrounding tissues. These crystals activate parts of the immune system, including the NLRP3 inflammasome, which triggers inflammatory signaling molecules such as interleukin-1 beta (IL-1β) (Dalbeth et al., 2021). In simple terms, the immune system reacts to the crystals and creates a powerful inflammatory response.

This can lead to:

• Pain
• Swelling
• Warmth
• Reduced mobility
  

How Common Is Gout?

Gout is more common than many people realize.

According to the Global Burden of Disease Study 2021, approximately 55.8 million people worldwide were living with gout in 2020. Researchers project that the global burden may continue to increase in the coming decades (GBD 2021 Gout Collaborators, 2024). This growing prevalence is one reason why early recognition and education are becoming increasingly
important.

Key Takeaways

Sudden pain in the big toe is one of the most common early signs of gout. The symptoms often include:

• Rapid onset of pain
• Swelling
• Redness
• Warmth
• Sensitivity to touch
• Difficulty walking
  

At the same time, other conditions can cause similar symptoms. A medical evaluation can help clarify the cause and identify appropriate treatment options. The good news is that gout is now one of the best-understood forms of inflammatory arthritis. With the right information and support, many people are able to reduce flares and protect their long-term joint
health. If you would like to learn more about gout, treatment options, nutrition, and everyday strategies, explore the educational resources available at Gout Compass.

Sources

Dalbeth N, Gosling AL, Gaffo A, Abhishek A. Gout. The Lancet. 2021;397(10287):1843–1855.

GBD 2021 Gout Collaborators. Global, regional, and national burden of gout, 1990–2021. The Lancet Rheumatology. 2024.

NICE Guideline NG219. Gout: Diagnosis and Management. National Institute for Health and Care Excellence. 2022.

Stewart S, Dalbeth N, Vandal AC, Rome K. The First Metatarsophalangeal Joint in Gout: A Systematic

Review and Meta-analysis. BMC Musculoskeletal Disorders. 2016;17:69.
FitzGerald JD, Dalbeth N, Mikuls T, et al. 2020 American College of Rheumatology Guideline for the Management of Gout. Arthritis Care & Research. 2020;72(6):744–760.

Richette P, Doherty M, Pascual E, et al. 2016 Updated EULAR Evidence-Based Recommendations for the Management of Gout. Annals of the Rheumatic Diseases. 2017;76(1):29–42.