Subcutaneous
The medical term for any swelling is called a lump
Dermoid is the medical term meaning skin-like
Bruise (medical term = ecchymosis)
SL stands for sublingual, which means under the tongue.
Subcutaneous injection and Intravenous injection
Interstitial
The medical term for a fatty deposit under the skin is lipoma.cellulite
Acrochordon is the medical term meaning skin tag. Skin tags can occur in areas of high friction.
Pyoderma is the medical term meaning any purulent skin condition.
Depending on which layer of the skin, it could be subdermal or subcutaneous (Sub: Under, Cutaneous: The skin). The prefix hypo- means below and the dermis is the bottommost layer of skin. So the medical term for beneath the skin is hypodermic.
"Infection".
Hyperpigmentation is the medical term meaning excessively darkened skin.