It is a recurrent pruritic , pink or pale swelling of the superficial dermis that may have initial flare around them . Lesion may vary from few to numerous . These lesions come and go rapidly within 24 hours sometimes swelling appeared around the mouth or eyes.
Causes :
Idiopathic (50%)
Upper respiratory tract (40%)
Drugs (9%)
Food ( 1%)
URTICARIA due to Temperature changes :
Heat contact Urticaria
Cold contact Urticaria
Urticaria due to Sweating :
Exercise induced