Urticaria

Hives occur as a swelling in the skin. That swelling usually lasts less than 24 hours but then reoccurs in other areas. The swelling has a sharp well-defined border. The number of lesions varies from a few too numerous covering over 50% of the body surface. The lesions of angioedema cause a deeper swelling with a little or no itching. Hives are either isolated or connected to each other causing a polycyclic or annular pattern. There are varying degrees of redness.

hives-Urticaria-leg

Hives occur as a swelling of the skin. They typically appear and are gone in less than 24 hours, only to be replaced by newer lesions.

acute-urticaria

Acute urticaria. These lesions have a round poly-cyclic pattern with clearing in the center.

hives-Acute

Acute urticaria showing the classic presentation of uniform welts on the skin surface

angioedema

Angioedema. Hives occuring deep in the skin are called angioedema. Swelling of the lips is a common presentation.

angioedema-back

Angioedema with massive swelling in the second layer of the skin. There was little or no itching in contrast to typical hives which may itch intensely.