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The term autoimmune urticaria refers to a subset of chronic spontaneous urticaria (CSU) cases where the immune system appears to play a significant role. This understanding began to evolve in the mid to late 20th century as advances in immunology revealed the complex interactions between the immune system and various diseases. [15]
PLAID syndrome is an inherited condition characterised by antibody deficiency and immune dysregulation, first described in 2012. The name is an acronym of "PLCG2-associated antibody deficiency and immune dysregulation". It is characterised by cold-induced urticaria, autoimmunity, atopy and humoral immune deficiency. [1]
A rare autoimmune disease characterized by recurrent urticaria (nettle rash), first described in the 1970s. There is no defined paradigm for the syndrome aetiology and severity in progression. Diagnosis is confirmed with the identification of at least two conditions from: venulitis on skin biopsy, arthritis, ocular inflammation, abdominal pain ...
Chronic spontaneous urticaria, despite its cause being unknown, is linked to a higher prevalence of autoimmune diseases, and is often worsened by triggers like stress, infections, certain foods, or nonsteroidal anti-inflammatory drugs. The hives and angioedema seen in CSU is thought to be linked to the degranulation of skin mast cells.
Both are characterized by an immune system malfunction which may cause similar symptoms, such as rash, swelling, or fatigue, but the cardinal cause or mechanism of the diseases are different. A key difference is a malfunction of the innate immune system in autoinflammatory diseases, whereas in autoimmune diseases there is a malfunction of the ...
While it’s unclear exactly what’s happening to cause this rash, Davis says that more severe cases may be a sign that the immune system is in such overdrive that it’s causing the blood to clog.
As of 2017 the cause of the disease was not understood. [1] A 2024 review by Braud and Lipsker aimed to "describe what is currently known about the pathogenesis of this peculiar disease, as well as to address its diagnosis and management" and concluded that "physiopathology of Schnitzler syndrome remains elusive" and "the main question regarding the relationship between the autoinflammatory ...
This causes dizziness, fainting, and exhaustion when standing for a long time. So, the longer they're upright, the more their blood pools in the lower part of their body.