What causes cholinergic urticaria?
A rise in core body temperature resulting in sweating causes the rash in cholinergic urticaria. Common triggers include: • Exercise • Hot baths/showers • Fever • Occlusive dressings • Eating spicy foods • Emotional stress It is not uncommon for patients with cholinergic urticaria to have another associated physical urticaria, such as dermographism, cold urticaria or pressure urticaria.
