What is the technical term for a birthmark?

The technical term for a birthmark is "nevus." This term is used in dermatology to describe a benign growth of melanocytes, which are the cells responsible for pigment production in the skin. Nevi can appear in various forms, such as moles, and some may be flat or raised, varying in color from tan to dark brown or even black. The medical terminology emphasizes the specific type of skin lesion, which helps in proper identification, treatment, and understanding of potential changes in the skin over time.

In contrast, dermatitis refers to inflammation of the skin, characterized by redness, swelling, and itching—it's not specifically a growth or mark on the skin, but rather a reaction to various stimuli or allergens. Psoriasis is a chronic autoimmune condition that results in the rapid growth of skin cells, leading to scaling and plaques; it is also distinct from a birthmark. Lastly, cellulitis is an infectious condition that affects the deeper layers of the skin and subcutaneous tissues, causing redness, swelling, and pain, and does not relate to non-infectious skin marks like nevi. Understanding these distinctions is important for identifying and discussing various skin conditions accurately.