ExerciseExercise-induced anaphylaxis: hives, stomach symptoms and sometimes full anaphylaxis from physical activity, often only after eating a specific food.
Sun and waterPolymorphous light eruption raises itchy red bumps within half an hour of sun. Aquagenic urticaria raises hives from bath water, rain, even tears.
Vibration and coinsVibratory urticaria welts up on a bumpy road or a lawnmower. Coin rashes are usually nickel allergy, which affects nearly one person in five.
Red Meat Allergy Comes From A Tick Bite