Biological Causes
TRAPS is caused by a mutation in the TNFRSF1A gene. This gene is responsible for creating a specific receptor for a protein called tumor necrosis factor (TNF), which helps regulate the body's immune response and inflammation. In people with TRAPS, the defective receptor does not function correctly, causing the immune system to remain "switched on" for longer than necessary. This leads to excessive and unprovoked inflammation, resulting in fever and pain. It is classified as an autoinflammatory disease, meaning the immune system attacks the body by mistake without the presence of autoantibodies usually seen in autoimmune diseases.

Genetic Risk Factors
The primary risk factor is a family history of the condition. TRAPS is inherited in an autosomal dominant pattern, which means a child only needs to inherit one copy of the mutated gene from an affected parent to develop the disorder. In some cases, the mutation occurs spontaneously in an individual with no family history of the disease. It affects both males and females equally and can occur in populations worldwide.

Triggers for Flare-ups
While episodes can occur spontaneously without any obvious cause, certain factors are known to trigger flare-ups in some people. Common triggers include physical or emotional stress, minor injuries, vigorous exercise, infection, and fatigue. Identifying and managing these triggers can sometimes help reduce the frequency of attacks, although preventing attacks entirely through lifestyle changes is difficult due to the genetic nature of the disease.

Prevention Strategies
Because TRAPS is a genetic disorder, there is no way to prevent the underlying condition (primary prevention). Strategies focus on secondary prevention, which involves taking prescribed medications to prevent the onset of symptoms or reduce their severity. Genetic counseling is recommended for affected individuals who are planning to start a family to understand the risks of passing the condition to their children.

Signs and Symptoms
The symptoms of TRAPS occur in distinct episodes or "flares" that typically last longer than other periodic fever syndromes, often persisting for one to three weeks. The most prominent symptom is a high fever. Accompanying the fever is often severe muscle pain (myalgia) that can migrate from one part of the body to another. A characteristic sign of TRAPS is periorbital edema, which is swelling and puffiness around the eyes. Patients frequently experience severe abdominal pain, chest pain caused by inflammation of the lining around the lungs (pleurisy), and joint pain. A red, painful skin rash may appear on the trunk or arms and legs, which is warm to the touch and may move as the attack progresses.

Diagnostic Tests
Diagnosing TRAPS can be challenging because its symptoms resemble other inflammatory diseases. Clinicians typically start by evaluating the patient’s medical history and the pattern of recurrent fevers. Blood tests are used during an attack to look for markers of widespread inflammation, such as elevated C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR). These levels usually return to normal or near-normal between attacks. A definitive diagnosis is confirmed through genetic testing, which identifies the specific mutation in the TNFRSF1A gene.

Differential Diagnosis
Doctors must rule out other causes of recurrent fever before confirming TRAPS. Conditions that are often confused with TRAPS include Familial Mediterranean Fever (FMF), systemic juvenile idiopathic arthritis, and various infections or malignancies. The long duration of TRAPS flares (weeks rather than days) and the specific presence of eye swelling help distinguish it from other periodic fever syndromes like FMF.

Medications
The main goal of treatment is to control inflammation, relieve symptoms during flares, and prevent long-term complications. Non-steroidal anti-inflammatory drugs (NSAIDs) may provide limited relief for mild pain and fever but are rarely sufficient for acute attacks. Corticosteroids are often effective in reducing the severity of symptoms when taken at the onset of a flare, but long-term use is avoided due to side effects. For patients with frequent or severe attacks, biologic medications are the standard of care. These drugs specifically target the proteins causing inflammation (such as IL-1 blockers or TNF inhibitors) and can prevent flares from occurring. Unlike some other fever syndromes, colchicine is generally not effective for TRAPS.

Monitoring and Follow-up
Regular follow-up with a rheumatologist or specialist is essential to monitor the effectiveness of treatment and check for complications. Patients typically undergo routine urine and blood tests to monitor kidney function and protein levels. This monitoring is crucial for detecting early signs of amyloidosis, a serious complication where abnormal proteins build up in organs. Treatment plans are often adjusted based on the frequency of flares and the presence of residual inflammation between attacks.

When to Seek Medical Care
Patients should contact their healthcare provider if they experience a fever that does not resolve, severe abdominal pain, or new symptoms that were not present in previous flares. Immediate medical attention is required if there are signs of severe dehydration, difficulty breathing, or sudden changes in urine output or appearance (such as frothy urine), which could indicate kidney involvement. Routine appointments should be kept even during symptom-free periods to ensure inflammation markers remain low.

Severity and Disease Course
The severity of TRAPS varies significantly from person to person, even among family members with the same genetic mutation. Some individuals experience mild attacks with long periods of wellness in between, while others have severe, frequent flares that significantly disrupt daily life. The disease is chronic, meaning it persists throughout a person's life. However, the frequency and intensity of attacks can naturally decrease with age in some patients. Without treatment, inflammation may be constant rather than periodic.

Complications
The most serious long-term complication of TRAPS is AA amyloidosis. This occurs when a protein called amyloid A, which is produced during inflammation, builds up in the kidneys and other organs. Over time, this can lead to kidney failure. Before effective treatments were available, this complication was more common, but modern biologic therapies have significantly reduced this risk. Other complications can include joint stiffness or scar tissue formation due to chronic inflammation.

Prognosis and Life Expectancy
The prognosis for individuals with TRAPS is generally good, especially when the condition is diagnosed early and managed effectively. Life expectancy is typically normal for patients who do not develop severe kidney complications. Regular monitoring of protein levels in the urine is the best way to track long-term risk. With adherence to treatment, most patients can prevent the progression to amyloidosis and maintain good general health.

Daily Activities and Coping
Living with TRAPS requires adapting to the unpredictable nature of flares. During active episodes, fatigue and pain may make it difficult to attend school or work, requiring flexibility and understanding from employers and teachers. Between attacks, most people can participate fully in sports, social activities, and work. Managing stress is important, as stress can sometimes trigger a flare. Patients often find it helpful to connect with support groups for rare autoinflammatory diseases to share experiences and coping strategies. Maintaining a healthy lifestyle with adequate sleep and nutrition supports overall immune health.

Questions to Ask Your Healthcare Provider
Preparing a list of questions can help you get the most out of your appointments. Consider asking the following:

• What signs usually indicate that a new flare is starting?
• How often do I need to have blood and urine tests to monitor for complications?
• What are the potential side effects of the biologic medications you are recommending?
• Should other members of my family be tested for the genetic mutation?
• Is it safe for me to receive live vaccines while on my current medication?

Q: Is TRAPS contagious?
A: No, TRAPS is a genetic disorder. You cannot catch it from someone else like a cold or the flu.

Q: Can TRAPS be cured?
A: There is currently no cure for the underlying genetic mutation, but the condition can be managed effectively with medication to suppress inflammation.

Q: Will my children inherit the condition?
A: Because TRAPS is an autosomal dominant condition, there is a 50 percent chance that a parent with the gene will pass it on to each of their children.

Q: How is TRAPS different from a regular fever?
A: Regular fevers are usually caused by infections like viruses or bacteria. TRAPS fevers are caused by a genetic flaw in the immune system and occur without any infection, often lasting much longer than a typical viral fever.

Q: Can diet changes stop the flares?
A: While a healthy diet supports overall health, there is no specific diet that has been proven to prevent TRAPS flares or correct the genetic cause.