Hair follicles are found in which skin layers?

• A. Dermis
• B. Epidermis
• C. Subcutaneous Layers
• D. Dermis, Epidermis, & Subcutaneous Layers

Answer: (D)

Hair follicles span more than one skin layer. They begin as an inward extension of the epidermis that travels downward into the dermis and can extend into the subcutaneous (hypodermal) layer. The hair bulb where growth occurs sits deep in the follicle, while the hair shaft must travel upward through the epidermis to reach the skin surface. Because the follicle extends through all three layers, it’s accurate to say hair follicles are found in the epidermis, dermis, and subcutaneous tissue. This depth and spread is why treatments aiming at the follicle consider its course through these layers.