Angioedema is swelling of tissue under the skin; it sometimes affects the face and throat and often occurs with hives. Which of the following is one way in which angioedema and hives differ?
Angioedema, but not hives, may be triggered by a reaction to a drug
Angioedema involves a greater amount of swelling than hives
Antihistamines may relieve mild symptoms of angioedema, but not hives
Tissue affected by angioedema may not itch
