Dermal
"Cutaneous" is the medical term that means pertaining to the surface of the skin.
Dermatologis means pertaining to dermatology, treatment of the skin.
Epidermal means pertaining to upon the surface of the skin.
The medical term for any swelling is called a lump
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.
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.
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).
Dermal
Subcutaneous
Dermoid is the medical term meaning skin-like
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.