Your subcutaneous tissue is the deepest layer of your skin. The prefix “sub” comes from the Latin word meaning under, and the word cutaneous derives from the Latin word “cutis,” which means skin.

Subcutaneous emphysema is the medical term for air becoming trapped in tissues beneath the skin. It is rare, but may occur as a result of trauma, injury, infection, or certain medical procedures.

The subcutaneous layer is the deepest skin layer. It protects a person’s body and keeps it warm. This layer also provides insulation and protection for vital tissues such as muscles, bones, and organs ...