Autoimmune progesterone dermatitis (APD ... Signs and symptoms of APD can present as urticaria, angioedema, erythema multiforme, and eczematous lesions, thought to be an unusual allergy to ...

Genetics can also play a role. People who have a family history of urticaria are more likely to develop it, as are people ...

Urticaria affects 10% to 25% of the population at some point in their life (Henderson, Fleischer, & Feldman, 2000). It is characterized by short-lived swellings of the skin, mouth, and genitalia ...