Abscess – a closed pocket filled with pus. These may be painful and pus can be visible, or they stay closed and appear much like tumors, requiring a biopsy.
Acne – a skin disorder involving pores and hair follicles, acne can appear as blackheads, pimples, scarring and other skin-related problems.
Angioma – a benign skin tumor, usually consisting of lymph vessels and blood.
Bullous – a large blister-like sac of fluid appearing on the skin.
Biopsy – the process of medically examining tissue microscopically, usually to discover what type of tissue it is, or to determine its behavior.
Blister – any pocket of bodily fluid on the skin.
Boil – swollen and sore areas of the skin that appear around hair follicles.
Carcinoma – a cancer deriving from the skin. Some types include basal and squamous cell carcinomas.
Carbuncles – a large painful swelling under the skin.
Collagen – a protein produced by the skin that gives it elasticity and strength.
Congenital – present at birth.
Cyst – a deep lesion filled with pus, blood or another fluid.
Dermatitis – a skin condition marked by skin inflammation.
Dermis – the middle layer of skin, between the subcutis and epidermis.
Eczema – also called atopic dermatitis, eczema is marked by itching, scaling and thickening skin, usually around the face, elbows or knees.
Epidermis – the topmost layer of skin, above the dermis.
Hives – raised, red, itchy patches on the skin, usually caused by allergies to a food or medicine. Also called urticaria.
Lentigines – dark areas of the skin caused by sun exposure. Also called age spots, liver spots or sun spots.
Lesion – areas of discoloration or inflammation, often caused by, or indicative of, tumors.
Melanin – the pigment that gives our skin color.
Melanocytes – cells that produce and distribute melanin to the skin.
Moles – raised dark areas in the skin caused by the damage or dysfunction of melanocytes.
Subcutis – the innermost layer of skin, beneath the dermis.