This group includes urticaria forms involving wheals, itchiness and/or angioedema which only appear when triggered by specific stimuli. The largest subgroup of physical/inducible urticaria is physical urticaria. The symptoms are triggered by rubbing, cold, heat, pressure and sunlight (i.e. physical stimuli). All forms of inducible urticaria can occur individually, together with one or several other forms of inducible urticaria or even frequently in patients suffering from spontaneous chronic urticaria.