What are hives (urticaria) and angioedema (swelling)?

What are hives (urticaria) and angioedema (swelling)?

Hives (urticaria) and angioedema (swelling) can occur together. Hives are raised red bumps or splotches on your skin. Angioedema (swelling) may occur in deep layers of tissue. This swelling can affect your face, lips, throat, hands, feet and genitals.