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PubMed This is a summary of 24 peer-reviewed journal articles Updated

Safety Warnings and When to Seek Urgent Care

At a Glance

A hot, swollen, or rapidly worsening joint may be a joint infection (septic arthritis), even without fever, and needs prompt assessment. New rashes after allopurinol or signs of a severe medication reaction require urgent care, while lowering uric acid helps prevent lasting gout damage.

While gout is highly treatable, both the disease itself and the medications used to manage it carry risks that require your attention [1][2]. Understanding these “red flags” can help you distinguish between a standard flare and a medical emergency.

When to Seek Urgent Care

A typical gout flare is agonizing, but it is not usually a life-threatening emergency. However, some conditions mimic gout and require immediate intervention.

Septic Arthritis (Joint Infection)

This is a medical emergency where a joint becomes infected with bacteria. It can destroy the joint in a matter of days and spread to your bloodstream [3].

Seek same-day medical assessment if you have:

  • Any first, new, atypical, or unusually severe hot, swollen joint [4].
  • An inability to bear any weight on the joint or move it at all [4].
  • Symptoms that are rapidly worsening over just a few hours [3].

Seek immediate emergency care if you have a hot, swollen joint ALONG WITH:

  • A fever or chills [5].
  • Confusion or a general feeling of being severely ill (systemic illness) [4].

Important Note: You can have a joint infection without a fever. You can also have gout crystals and an infection in the same joint at the same time [6]. Doctors must often draw fluid from the joint to rule out infection [7][8].

Severe Medication Reactions

Certain gout medications can cause rare but life-threatening allergic reactions [9]. If you experience any of the following, seek urgent medical help and ask a clinician which medications to stop immediately:

  • Any new rash (especially after starting allopurinol). Do not wait for it to become widespread; contact a clinician urgently [10].
  • Blistering or peeling skin, or painful sores in your mouth, eyes, or genital area [11].
  • Significant swelling of your face or tongue, or difficulty breathing [10].
  • Yellowing of the skin or eyes (jaundice) [12].
  • Severe vomiting or diarrhea, unusual bruising, or muscle weakness (particularly with colchicine toxicity).

Medication Safety and Genetic Testing

Allopurinol and the HLA-B*58:01 Gene

Allopurinol Hypersensitivity Syndrome (AHS) is a rare but very serious reaction that can cause organ failure and severe skin peeling [1].

  • The Genetic Link: A specific gene called HLA-B*58:01 makes this reaction much more likely [13]. This gene is more common in people of Han Chinese, Thai, Korean, and African American descent [14].
  • Testing: Guidelines recommend testing for this gene in high-risk populations before starting allopurinol [13]. If you test positive, your doctor will likely prescribe a different medication, such as febuxostat [14].

Febuxostat and Heart Safety

For patients who cannot take allopurinol, febuxostat is a powerful alternative. However, there has been significant medical debate regarding its heart safety [2].

  • The Evidence: One major study (CARES) found a higher risk of heart-related deaths in patients taking febuxostat who already had established heart disease [2]. A newer study (FAST) found no such increased risk, but this study was done in a specific population without severe heart failure or recent heart attacks [15].
  • Your Strategy: Regulatory warnings still exist for febuxostat. Allopurinol is generally preferred when suitable. If you have a history of cardiovascular disease, you must make a shared decision with your doctor regarding the risks and benefits of febuxostat [16]. Do not stop taking it without medical advice.

Complications of Unmanaged Gout

If uric acid levels remain consistently high, gout can progress to cause lasting damage [17].

  • Tophi: These are chalky clumps of crystals that grow in joints and tissues [18]. They can eventually break through the skin, leading to infections [19].
  • Joint Erosions: Chronic inflammation can lead to permanent bone damage (erosions) resulting in chronic pain and disability even when a flare is not occurring [20][21].
  • Kidney Stones: High levels of uric acid are associated with an increased risk of uric acid kidney stones [22]. High urate levels and gout share many risk factors with kidney disease, though treating urate has not been definitively proven to prevent kidney function decline.
  • Spinal Gout: In rare cases, crystals can deposit in the spine, causing numbness, weakness, or severe back pain that may mimic a slipped disc or spinal infection [23][24].

Gout is a highly treatable condition. By working with your care team to safely lower your uric acid to the target level, you can dissolve harmful crystal deposits, prevent further joint damage, and stop the cycle of pain.

Common questions in this guide

How can I tell whether a hot, swollen joint could be infected?
A new, unusually severe, hot, swollen joint that is rapidly worsening or cannot bear weight or move needs same-day medical assessment. Fever, chills, confusion, or feeling severely ill with these symptoms requires emergency care. Infection can occur alongside gout, so a clinician may need to remove and test joint fluid.
Can a joint infection happen without a fever?
Yes. A joint infection can occur without fever, and infection and gout crystals can be present in the same joint. Doctors may need to draw fluid from the joint and test it to distinguish infection from a gout flare.
What should I do if I develop a rash after starting allopurinol?
Contact a clinician urgently about any new rash after starting allopurinol rather than waiting for it to spread. Blistering or peeling skin, mouth or eye sores, facial or tongue swelling, breathing difficulty, or jaundice require urgent medical help. Ask a clinician which medicines to stop immediately.
Who should have HLA-B*58:01 testing before taking allopurinol?
Guidelines recommend considering HLA-B*58:01 testing before allopurinol for people in higher-risk ancestry groups, including Han Chinese, Thai, Korean, and African American people. Carrying this gene variant increases the risk of a rare but severe reaction. If the result is positive, a clinician may choose another urate-lowering medicine, such as febuxostat.
Is febuxostat safe if I have heart disease?
Febuxostat may be an option when allopurinol cannot be used, but people with cardiovascular disease should discuss its risks and benefits with their clinician. Studies have found differing results about heart-related risk, and regulatory warnings remain; allopurinol is generally preferred when suitable. Do not stop febuxostat without medical advice.
What complications can uncontrolled gout cause?
Persistently high uric acid can cause tophi, permanent joint erosions, chronic pain, disability, and uric acid kidney stones. Rarely, crystals can deposit in the spine and cause severe back pain, numbness, or weakness. Lowering uric acid to the target level can dissolve harmful deposits and help prevent further joint damage.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Based on my ancestry and kidney function, should I be tested for the HLA-B*58:01 gene before starting allopurinol?
  2. 2.Given my cardiovascular history, is febuxostat a safe option for me compared to allopurinol?
  3. 3.If I develop a mild rash, should I stop my medication immediately or wait for a clinic appointment?
  4. 4.What specific signs would indicate that my joint flare has turned into a dangerous infection (septic arthritis)?
  5. 5.How often should we monitor my kidney function and liver tests while I am on these medications?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

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This page explains gout warning signs and medication risks for informational purposes only and does not constitute medical advice. Contact a healthcare professional promptly about concerning symptoms, and seek emergency care for severe or rapidly worsening symptoms.

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