Clinical Research Directory

Inclusion criteria : * Adults ≥ 18 years old * Cholinergic urticaria diagnosed based on the diagnostic criteria published in 2016 (Magerl et al) : pruritic micropapules triggered by active or passive exposure to heat. * Exercise test performed within the 6 months prior to inclusion. Exclusion criteria : * Patients on H1 antihistamines within 72 hours before infrared exposure test * Patients on any other specific treatment for cholinergic urticaria within a period of 5 plasma half-lives before infrared exposure test * Patients with exercise-induced anaphylaxis (diet-induced or not) * Patients with severe forms of cholinergic urticaria: angioedema, respiratory manifestations or anaphylaxis * Participants who have reached the maximum compensation amount for their participation in research studies. * Lack of consent (adults, non-emancipated minors, individuals unable to express consent, research conducted in emergency situations, etc.). * Not being affiliated with or a beneficiary of a French social security scheme. * Protected adults (under guardianship, curatorship, or judicial protection). * Individuals participating in another research study with an ongoing exclusion period. * Subjects deprived of liberty (Art. L. 1121-6) (by judicial or administrative decision, or involuntary hospitalization). * Pregnant or breastfeeding women. * Subjects who cannot read and/or write.