SEVERE HIVES: Angioedema is the rapid swelling of the skin, including the dermis, deep dermis, mucosa, and subcutaneous tissue. If angioedema is acquired, it is usually caused by an allergy; if it is hereditary, it is due to a genetic mutation. The skin of the face, around the mouth, throat, and the tongue may swell up over the period of minutes to several hours. It may be a medical emergency.
Answered 7/26/2017
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