The medical term for any swelling is called a lump
The top layer of skin is called the epidermis; epidermal is the medical term meaning pertaining to the skin's surface.
Dermatologis means pertaining to dermatology, treatment of the skin.
Dermal
Epidermal means pertaining to upon the surface of the skin.
Hypodermic means under the skin. Hypo means under, dermis (dermic) means skin. Like a hypodermic needle is inserted under the skin.
The word is "dermatology" from the root derm or derma, meaning skin. Dermatology is the branch of medicine that is concerned with the physiology and pathology of the skin.
The prefix is sub- (meaning underneath or below), the suffix is -ous (meaning to pertain to) and the root word is -cutane- meaning skin. The word subcutaneous means pertaining to beneath the skin.
Sebum is the medical term for the oil that protects the skin. Related words are seborrhea (excess flow of sebum) and seborrheic (pertaining to that excess flow).
Subcutaneous
Dermal
Subcutaneous
The medical term for "pertaining to scales or covered with scales" is "squamous." This term is commonly used to describe certain types of epithelial cells or skin conditions characterized by scale-like appearance.