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That is a rare complication called "subcutaneous emphysema".
sore throat, pain or swelling of the face and neck, chest pain, subcutaneous emphysema, and difficulty swallowing.
My heart, muscles,and feet are subcutaneous.
People with this type of emphysema have a hereditary deficiency of a blood component, an enzyme inhibitor called alpha-1-antitrypsin
The hypodermis contains subcutaneous fat.