Genetic urticaria

Genetic urticaria (Orphanet code 182734) is a broad grouping term that encompasses several rare hereditary conditions characterized by recurrent episodes of urticaria (hives) — raised, itchy wheals on the skin — that arise due to underlying genetic causes rather than allergic or acquired triggers. These conditions affect primarily the skin and immune system, though some forms may also involve systemic inflammation affecting joints, eyes, and the nervous system. The category includes disorders such as familial cold autoinflammatory syndrome, Muckle-Wells syndrome, and other hereditary periodic fever syndromes in which urticaria is a prominent feature. In many of these conditions, mutations in genes involved in innate immune regulation (such as NLRP3) lead to excessive inflammatory signaling and spontaneous mast cell or neutrophil activation. Key symptoms across the genetic urticaria spectrum include recurrent or chronic hives, skin flushing, and in some subtypes, fever, joint pain, conjunctivitis, and sensorineural hearing loss. Onset is typically in infancy or early childhood, though the age of presentation can vary depending on the specific underlying genetic disorder. Episodes may be triggered by cold exposure, physical stimuli, or may occur spontaneously. Treatment depends on the specific genetic diagnosis. Conventional antihistamines, which are effective in common acquired urticaria, often provide limited relief in genetic forms. For autoinflammatory subtypes caused by NLRP3 mutations, interleukin-1 (IL-1) inhibitors such as anakinra and canakinumab have shown significant efficacy and represent a major therapeutic advance. Genetic testing and referral to a specialist in autoinflammatory diseases are recommended for accurate diagnosis and targeted management.

Common questions about Genetic urticaria