Gout

What is gout?

From: MedlinePlus, National Library of Medicine

Gout is a common type of inflammatory arthritis. It causes pain, swelling, and redness in one or more joints. It usually happens as a flare, which can last for a week or two and then gets better. The flares often begin in your big toe or a lower limb.

What causes gout?

From: MedlinePlus, National Library of Medicine

Gout happens when too much uric acid (urate) builds up in your body over a long time. Uric acid is a waste product your body makes when it breaks down purines. Purines are substances that are in your body's tissues and in many foods.

When your body breaks down old cells or digests foods that contain purine, most of the uric acid that's made dissolves in your blood. Your kidneys filter the uric acid out of your blood, and it leaves your body in your urine (pee).

However, sometimes your body can make too much uric acid or does not remove enough of it. Then the uric acid levels build up in your body, including in your blood. Having too much uric acid in the blood is called hyperuricemia. It does not cause health problems for everyone. But in some people, uric acid forms needle-like crystals. They can form in your joints, which causes gout. The crystals can also cause kidney stones.

Calcium pyrophosphate arthritis, sometimes called pseudogout, is a related disease. It causes similar symptoms and is sometimes confused with gout. But it is caused by a buildup of calcium phosphate, not uric acid.

Who is more likely to develop gout?

From: MedlinePlus, National Library of Medicine

Many people develop gout. You are more likely to get it if you:

• Are male.
• Are older; it usually develops in middle age.
• Have obesity.
• Have certain health conditions, such as: Heart failure High blood pressure Metabolic syndrome Chronic kidney disease Conditions that cause your cells to break down more quickly, such as psoriasis or some cancers Rare genetic conditions that lead to increased uric acid
• Have a family history of gout.
• Have an unhealthy diet and eat foods that are rich in purines, such as red meat, organ meats, certain seafoods.
• Drink alcohol.
• Eat and drink lots of foods and beverages that contain fructose (a type of sugar).
• Take certain medicines, such as diuretics (water pills), low-dose aspirin, and some medicines that weaken your immune system.
• Take high amounts of niacin (vitamin B-3).

What are the symptoms of gout?

From: MedlinePlus, National Library of Medicine

Gout usually happens in only one joint at a time. It is often found in the big toe, but can also affect other joints, including your other toes, ankle, and knee.

Gout flares often start suddenly at night, and the symptoms in the affected joint often include:

• Intense pain, which may be bad enough to wake you up
• Swelling
• Redness
• Warmth

The flares typically get better within a week or two. In between flares, you usually don't have symptoms. Some people may have flares often, while others may not have another flare for years. But over time, if left untreated, your flares may happen more often and last longer.

And if gout is untreated over long periods of time, you can develop tophi. Tophi are hard, uric acid deposits under the skin. They start out as painless, but over time, they can become painful. They can also cause bone and soft tissue damage and misshapen joints.

How is gout diagnosed?

From: MedlinePlus, National Library of Medicine

To find out if you have gout, your health care provider:

• Will take your medical history, which includes asking about your symptoms.
• Will do a physical exam, including examining the affected joint(s).
• May order various tests, such as: A test of a sample of fluid from one of your painful joints. The fluid is examined under a microscope and is checked for uric acid crystals. A uric acid blood or urine test. An ultrasound or special CT scan to look for uric acid crystal buildup in the affected joint and check for other conditions that may be causing the symptoms.

What are the treatments for gout?

From: MedlinePlus, National Library of Medicine

There are effective treatments for gout. Which treatment you get will depend on your symptoms and the cause of your gout. The goals of your treatment will be to:

• Reduce the pain from gout flares, by using medicines such as: Nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen. Acetaminophen and the anti-inflammatory drug colchicine. Oral or injected corticosteroids.
• Prevent future flares, for example by: Making lifestyle changes such as losing weight, limiting alcohol, and avoiding foods high in purines. If you are taking medicines that can cause high uric acid in the blood, your provider may suggest stopping or changing those medicines. If needed, taking medicines to lower uric acid in the blood.
• Prevent tophi and kidney stones, for example with medicines that lower uric acid in the blood.

With early diagnosis, treatment, and lifestyle changes, gout is one of the most controllable forms of arthritis. Treatment and lifestyle changes may help people avoid gout flares, lessen their symptoms, and sometimes even become gout free.

Genetic causes described in the linked summary

From: MedlinePlus Genetics

Gout is caused by a combination of genetic and environmental factors. Some of the factors that contribute to this condition have been confirmed by research, while others are unknown. The main risk factor for developing gout is hyperuricemia. About one-quarter of individuals with hyperuricemia go on to develop gout. It is unclear why others with hyperuricemia do not get gout.

Large studies have identified dozens of genes that play a role in the development of gout. Multiple genetic changes, each with a small effect, likely combine to increase the risk of developing this disorder. Most of the known genes play a role in transporting urate, which is a byproduct of normal biochemical processes. Many gout-associated genes play a role in releasing urate into the urine if levels are too high or reabsorbing it back into the bloodstream if more is needed in the body. Other associated genes are involved in transporting or breaking down sugars or transporting other small molecules. The roles of some associated genes are unclear. Of all the genes that have been studied, two genes, SLC2A9 and ABCG2, seem to have the greatest influence on urate levels.

The SLC2A9 gene provides instructions for making a protein that is found primarily in the kidneys where it plays a role in managing the body's levels of urate. This protein helps reabsorb urate into the bloodstream or release it into the urine. Genetic changes in the SLC2A9 gene that can result in hyperuricemia increase the reabsorption of urate into the bloodstream and decrease its release into the urine.

The ABCG2 gene provides instructions for making a protein that helps release urate into the gut so that it can be removed from the body. Genetic changes in the ABCG2 gene that can result in hyperuricemia reduce the protein's ability to release urate into the gut.

Nongenetic factors are also believed to play a role in gout, primarily by triggering flares. These factors also often increase urate levels in the body. Consuming foods and beverages that are high in molecules called purines, such as red meat, seafood, dried beans, alcohol, and sugar-sweetened beverages can lead to increased urate. When purines are broken down, urate is made, which can cause hyperuricemia and lead to gout in some individuals. The risk for gout also increases with age. In particular, women have an increased risk after menopause. Following menopause, production of the hormone estrogen, which plays a role in removing urate from the body, declines so older women have a rise in urate levels and an increased risk of developing gout.

Inheritance described in the linked summary

From: MedlinePlus Genetics

The inheritance pattern of gout is unclear because many genetic and environmental factors appear to be involved. However, having a close relative with gout likely increases a person's risk of developing the condition.

Which doctor should you see?

The suggested department for discussing Gout is Rheumatology, with a rheumatologist as the relevant type of clinician. General physician / Family Medicine; paediatrician for children. Referral depends on symptoms.

Additional services that may be relevant, depending on the findings, include: Clinical Genetics.

This is an editorial referral starting point. The appropriate clinic depends on the person’s age, symptoms, previous diagnosis and local services. The first clinician can decide whether another specialty or a team is needed; a department label does not confirm the diagnosis.

How to prepare for an assessment

Bring a short timeline of the main symptoms: when they first appeared, whether they are constant or episodic, what seems to change them, and how they affect daily activities. Include previous reports, discharge summaries, current medicines and supplements, allergies, and any relevant family history. A dated record is more useful than trying to match every feature in an online article.

Ask the clinician what is already established and what remains uncertain. If a test is suggested, ask what question it answers, what its limitations are and how the result would change the next step. The information here is not an instruction to arrange every possible test. In children, bring growth, developmental and school information if it is relevant to the concern.

• Are the findings inflammatory, structural or due to another mechanism?
• Is there evidence that other organs need assessment?
• How will function and any treatment-related risks be monitored?

Treatment discussions and follow-up

Where the source describes treatments, these are an overview of possible care, not a prescription for an individual. Ask which option applies to the confirmed diagnosis, what benefit is expected, what adverse effects to watch for and how progress will be assessed. Availability, approvals and local practice can differ from the country described in the source.

Before leaving the appointment, clarify the next review date, who will communicate results, and whom to contact if the situation changes. Discuss difficulties with sleep, work, school, mobility, eating or emotional wellbeing when these are relevant. Practical support may require coordination between the treating clinician and other services.

The collected references do not establish a complete prevention or long-term outlook section for this entry. Missing information should not be interpreted as proof that prevention is impossible or that a particular outcome is inevitable. Ask what is known for the exact subtype, stage and personal circumstances, and which uncertainties remain.

When to seek emergency help

Severe breathing difficulty, collapse, new stroke-like symptoms, a seizure that is prolonged or repeated without recovery, uncontrolled major bleeding, or an immediate risk of self-harm require emergency help. In India, call 112 or reach the nearest emergency department. This is a general, non-exhaustive warning list; it is not a condition-specific triage tool.