Background: Urticaria is a common skin disease characterized by transient and itchy swelling. The spectrum of etiologic factors in urticaria is very wide and contains external factors such as drugs, foods and internal diseases such as infections, SLE, hormonal factors and even lymphoma. Objective: To determine different kinds of urticaria and different etiologic and prevocational factors in pat...

Background: Chronic autoimmune urticaria (CAU), a subgroup of chronic idiopathic urticaria (CIU), is characterized by severe and persistent wheals accompanied by redness and itching. Diagnosis is almost completely based on clinical suspicion and the results of the autologous serum skin test (ASST). Objectives: To determine the frequency of CAU and compare the clinical and laboratory parameters ...

BACKGROUND: Chronic urticaria is a debilitating disease that considerably affects health-related quality of life, and the Chronic Urticaria Quality of Life Questionnaire is the only questionnaire specifically designed for its evaluation. OBJECTIVE: To evaluate the quality of life of patients with chronic urticaria, using the Brazilian Portuguese version of the Chronic Urticaria Quality of Lif...

BACKGROUND Non-steroidal anti-inflammatory drugs (NSAIDs), especially aspirin, and food additives (FAs) may exacerbate allergic symptoms in patients with chronic idiopathic urticaria and food-dependent exercise-induced anaphylaxis (FDEIA). Augmentation of histamine release from human mast cells and basophils by those substances is speculated to be the cause of exacerbated allergic symptoms. We ...

: Chronic urticaria is a skin disorder characterized by transient pruritic weals that recur from day to day for 6 weeks or more. It has a great impact on patients' quality of life. In spite of this prevalence and morbidity, we are only beginning to understand its physiopathology and we do not have a curative treatment. Moreover, a patient with chronic urticaria may undergo extensive laboratory ...

BACKGROUND Penicillin allergy is the most commonly reported drug allergy and often presents with cutaneous symptoms. Other common diagnoses, such as chronic urticaria, may be falsely attributed to penicillin allergy. Because chronic urticaria is fairly common in the general population, evaluation of its prevalence in patients with self-reported penicillin allergy was of interest. Similarly, the...