Symptoms, Warning Signs, and Emergencies in DADA2

Living with DADA2 means learning to distinguish between the routine symptoms of chronic inflammation and the “red flag” signs of a medical emergency. While the disease can affect many parts of the body, the most critical risks involve the blood vessels and the nervous system ^[1][2].

Routine Inflammatory Symptoms

Many people with DADA2 experience ongoing symptoms that, while distressing, are typically managed through regular specialist care. It is important to note that the exact percentages of patients experiencing these symptoms vary substantially depending on the cohort, age, and phenotype studied:

• Recurrent Fevers: A large portion of patients (roughly half in some studies) experience fevers that come and go without a clear infection ^[3]. These are part of the body’s overactive inflammatory response ^[4].
• Skin Changes: Skin manifestations are very common ^[3]. The most classic is livedo racemosa, a purple, lace-like pattern on the skin that looks like a net ^[5]. Unlike simple livedo reticularis, which often disappears when the skin is warmed, livedo racemosa is often persistent and covers larger, irregular areas ^[6].
• Aches and Pains: Many patients experience joint pain or swelling, and some report significant muscle pain ^[3].
• Fatigue: A deep, persistent tiredness is reported by many patients ^[5].

Understanding Stroke in DADA2

The most serious complication for many with DADA2 is stroke. Because the disease causes inflammation in small blood vessels, it can lead to lacunar infarcts (small areas of damage) in various parts of the brain ^[2][7]. Neurological events can start in childhood and affect a significant portion of patients ^[1][3].

There are two main types of stroke seen in DADA2:

1. Ischemic Stroke: This happens when a blood vessel is blocked, cutting off oxygen to the brain. This is the most common type in DADA2 ^[2].
2. Hemorrhagic Stroke: This happens when a weakened blood vessel leaks or bursts ^[8][7].

EMERGENCY RED FLAGS: STROKE

Seek immediate emergency medical care (call 911 or your local emergency number) if you or your child experience any sudden neurological changes. Do NOT drive the patient to the hospital yourself—call for an ambulance.

• F - Face: One side of the face droops or is numb. When the person smiles, the smile is uneven ^[9].
• A - Arm: One arm (or leg) is weak or numb. If the person tries to raise both arms, one arm drifts downward ^[9].
• S - Speech: Speech is slurred, or the person is unable to speak or hard to understand ^[9].
• T - Time: Note the “last known well” time and call emergency services immediately.

Other Neurological Red Flags:
Strokes in DADA2 can affect areas like the brainstem and deep brain structures, but lacunar injury can happen in many different parts of the brain. You must also seek emergency care for any sudden changes, even if they resolve, including:

• Sudden loss of balance, coordination, trouble walking, or severe dizziness ^[2].
• Double vision, sudden loss of vision, or abnormal eye movements ^[1].
• Sudden difficulty swallowing, a change in voice, or speech changes ^[10].
• Sudden, severe, or unusual headache ^[1].
• A new seizure, sudden confusion, or behavior changes ^[2].

A Note on Blood Thinners and Aspirin

Because DADA2 can involve both ischemic strokes (clots) and hemorrhagic strokes (bleeds), you should not self-medicate with aspirin or blood thinners if you suspect a stroke. Call emergency services immediately. Let the emergency or hematology team decide on the use of antiplatelet or anticoagulant medications after they have performed brain imaging and reviewed your individual bleeding risk. Do not independently stop a blood thinner that was previously prescribed to you by a specialist without their direct guidance ^[8][11].

Other Serious Signs and Emergencies

Beyond stroke, other symptoms require prompt medical attention because they may indicate organ damage or severe inflammation.

Seek Emergency Care For:

• Bowel Ischemia/Major Bleeding: Severe abdominal pain, vomiting blood, fainting, or black/bloody stools ^[4][12].
• Threatened Tissue: If fingers or toes become suddenly blue, cold, or intensely painful ^[13].
• Hypertensive Emergency: Very high blood pressure accompanied by symptoms like severe headache or chest pain ^[14][15].

Call Your Specialist Same-Day For:

• Unusual Bleeding: Minor but unusual bruising or nosebleeds ^[16].
• Infection Risks: Fever while taking a biologic medication (like a TNF inhibitor) or when you are known to have low white blood cells. This could be a sign of a serious infection rather than just a DADA2 flare. Work with your doctor to establish a clear temperature threshold and action plan for fevers.