For specific medical advice, diagnoses, and treatment, consult your doctor. If the cause is not obvious, all nonessential drugs should be stopped until symptoms resolve. Urticaria, angioedema, and pruritus. Allergic Reaction First Aid: Both hives and angioedema involve swelling, but in angioedema, the swelling is deeper under the skin than it is with hives, and it may not itch. However, angioedema can be dangerous when the swelling is severe and occurs near the throat.
Anaphylactic shock and bad attacks of hives or angioedema are rare.
Urticaria (Hives) and Angioedema
Angioedema may be part of a serious medical condition. Angioedema Angioedema may cause large welts below the surface of the skin, particularly on the eyes and lips. Allergic Reactions Blood Test: Anaphylactic shock and bad attacks of hives or angioedema are rare. In most cases, hives and angioedema are harmless and don't leave any lasting marks, even without treatment.