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Gout
Gout typically affects adults, leading to sudden, severe attacks of pain, swelling, redness, and tenderness in the joints. It is a metabolic condition influenced by a combination of genetic and lifestyle factors.
Overview
Gout is a type of inflammatory arthritis that results from high levels of a substance called uric acid (urate) in the blood. When uric acid levels become too high, it can form sharp, needle-like crystals, most commonly in and around the joints [PMID:33675037]. These crystals can trigger sudden and very painful inflammation, known as a gout attack or flare. While gout can affect any joint, it most frequently occurs in the big toe. It is a common condition, affecting approximately 3% of adults in the UK. Although it can affect anyone, gout is more prevalent in men and older individuals.
Symptoms & clinical features
Gout attacks typically come on suddenly, often without warning, and can be extremely painful. The affected joint becomes intensely painful, swollen, red, and warm to the touch. The skin over the joint may appear shiny and taut. While the big toe is the most commonly affected joint, gout can also impact other areas such as the ankles, knees, elbows, wrists, and fingers. These attacks often occur at night and can last for several days to a week, even without treatment [PMID:33675037]. Between flares, individuals may experience periods with no symptoms. However, without proper management, attacks can become more frequent and prolonged, potentially leading to chronic arthritis and joint damage.
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Affected organs
The primary organs and tissues affected by gout are the joints, particularly those in the feet, ankles, and hands. Over time, repeated gout attacks can cause damage to the joint cartilage and bone, leading to chronic pain and reduced mobility. Beyond the joints, uric acid crystals can also accumulate in soft tissues, forming chalky deposits called tophi [PMID:30138986]. Tophi can develop under the skin, especially around the ears, elbows, and fingers, and can also form in the kidneys, potentially contributing to kidney stones or impaired kidney function. While less common, high uric acid levels have also been associated with an increased risk of other health issues, including cardiovascular disease.
Risks & severity
The severity of gout can vary significantly between individuals. Some people may experience infrequent, mild attacks, while others can have frequent, severe flares that significantly impact their quality of life. The lifetime risk of developing gout is influenced by various factors, including genetics, diet, alcohol consumption, certain medications, and other health conditions like obesity, high blood pressure, and kidney disease. Without effective management, gout can progress from intermittent acute attacks to chronic gouty arthritis, causing persistent joint pain, joint damage, and the formation of tophi. The condition is generally considered to have a later age of onset, typically affecting adults, with prevalence increasing with age.
Genetic causes
Gout is considered a complex or polygenic condition, meaning it is influenced by multiple genetic factors in combination with lifestyle and environmental elements. Several genes are known to play a role in regulating uric acid levels in the body. For instance, variants in genes like SLC2A9, SLC22A12, and ABCG2 are associated with how the body handles uric acid, particularly its transport and excretion by the kidneys [PMID:30138986]. These genes encode proteins that act as transporters, helping to move uric acid into or out of cells, including those in the kidneys responsible for filtering waste products. Pathogenic changes in these genes can lead to reduced excretion or increased reabsorption of uric acid, resulting in higher blood levels and an increased risk of crystal formation and gout.
Inheritance pattern
Gout is not inherited in a simple Mendelian pattern (like autosomal dominant or recessive conditions) because it is a polygenic disorder. This means that multiple genes, each contributing a small effect, along with environmental and lifestyle factors, determine an individual's susceptibility. If a close relative has gout, an individual may have an increased genetic predisposition, but it does not mean they will definitely develop the condition. The overall risk for family members is complex and depends on the specific combination of genetic variants they inherit, as well as their individual lifestyle choices.
Diagnosis & testing
Diagnosis of gout typically involves a combination of clinical assessment and laboratory tests. A doctor will evaluate symptoms, medical history, and may order blood tests to measure uric acid levels. While high uric acid levels can indicate a risk of gout, it's important to note that some people with high levels never develop gout, and some people can have normal levels during an acute attack. The most definitive diagnosis involves taking a sample of fluid from the affected joint and examining it under a microscope to identify uric acid crystals [PMID:33675037]. In the UK, if a genetic contribution to recurrent or severe gout is suspected, particularly in younger individuals or those with a strong family history, a referral to a clinical geneticist may be considered. Genetic testing is not routinely performed for typical gout but may be part of an investigation under an NHS Genomic Medicine Service pathway if an underlying genetic cause for very high uric acid levels (e.g., inborn errors of metabolism) is being explored. Relevant NHS R-codes would be determined by the clinical indication.
Management & lifestyle
The management of gout in the UK typically involves both treating acute attacks and preventing future flares and complications. During an acute attack, pain and inflammation can be managed with anti-inflammatory medications. For long-term prevention, doctors may prescribe medications to lower uric acid levels, often known as urate-lowering therapy. These treatments aim to reduce the amount of uric acid in the body, preventing crystal formation and dissolving existing crystals [PMID:33675037]. Lifestyle modifications, such as maintaining a healthy weight, limiting alcohol intake, and avoiding foods high in purines (which break down into uric acid), may also be recommended. Patients generally receive care from their GP, with referrals to rheumatologists for specialist management in complex or severe cases. Genetic counsellors can provide information and support to individuals and families where there is a strong genetic component suspected, or in cases of rare metabolic disorders that cause gout.
UK care pathway
In the UK, individuals with suspected gout typically begin their care pathway with their General Practitioner (GP). If specialist input is required, a referral to a rheumatologist is common. The NHS Genomic Medicine Service (GMS) may be involved for more complex cases, particularly those with early-onset, severe, or atypical gout where an underlying genetic cause might be considered. Genetic counselling services are available to discuss inheritance patterns, testing options, and potential implications for family members, especially when specific genetic factors are identified through genomic testing (which would fall under relevant PanelApp R-codes if applicable).
Frequently asked questions
What should I do during a gout attack?
During a gout attack, it is advisable to rest the affected joint and elevate it. Applying ice packs can help reduce pain and swelling. Over-the-counter pain relievers or prescribed anti-inflammatory medications from your GP can help manage symptoms. It is important to contact your doctor for advice on appropriate treatment.
Can diet affect my gout?
Yes, diet can influence gout. Certain foods, particularly those high in purines like red meat, organ meats, and some seafood, can increase uric acid levels. Limiting alcohol, especially beer and spirits, and avoiding sugary drinks may also be beneficial. Maintaining a healthy, balanced diet is generally recommended for managing gout.
Is gout curable?
Gout is typically a chronic condition, but it is highly manageable. While there isn't a 'cure' in the sense of eliminating the underlying tendency for high uric acid, effective medications and lifestyle adjustments can prevent attacks, reduce uric acid levels, and prevent long-term complications. Many people with gout can live symptom-free with proper management.
Will my children inherit gout?
Gout has a genetic component, meaning a tendency towards it can run in families, but it is not inherited in a simple way. It's a polygenic condition, influenced by multiple genes and lifestyle factors. While your children may have an increased predisposition due to family history, it does not guarantee they will develop gout, especially if they adopt a healthy lifestyle.
What is the difference between gout and pseudogout?
Both gout and pseudogout cause joint pain and swelling, but they are caused by different types of crystals. Gout is due to uric acid crystals, while pseudogout is caused by calcium pyrophosphate crystals. A doctor can differentiate between the two by examining fluid from the affected joint.
References
- Danve A, Sehra ST, Neogi T. Role of diet in hyperuricemia and gout. Best practice & research. Clinical rheumatology. 2021. PMID: 34802900
- Dalbeth N, Choi HK, Joosten LAB. Gout. Nature reviews. Disease primers. 2019. PMID: 31558729
- Asghari KM, Zahmatyar M, Seyedi F. Gout: global epidemiology, risk factors, comorbidities and complications: a narrative review. BMC musculoskeletal disorders. 2024. PMID: 39702222
- Singh JA, Gaffo A. Gout epidemiology and comorbidities. Seminars in arthritis and rheumatism. 2020. PMID: 32620196
- Afinogenova Y, Danve A, Neogi T. Update on gout management: what is old and what is new. Current opinion in rheumatology. 2022. PMID: 34907116
- Yokose C, McCormick N, Choi HK. Dietary and Lifestyle-Centered Approach in Gout Care and Prevention. Current rheumatology reports. 2021. PMID: 34196878
- McCarty KL, Gaffo AL, Diaz-Torne C. Gout therapy updated. Therapeutic advances in musculoskeletal disease. 2025. PMID: 41146690
- Gu H, Yu H, Qin L. MSU crystal deposition contributes to inflammation and immune responses in gout remission. Cell reports. 2023. PMID: 37756161