The sebaceous gland is a microscopic gland found in a person’s skin. In fact, the skin contains many of these glands, which produce and secrete sebum. Sebum is a yellowish, waxy substance that has an oily feel to it. It helps keep a person’s skin and hair from becoming too dry. Sebaceous glands are attached to the bottom of hair follicles in the skin. Cells within the sebaceous gland have the job of producing sebum. In time, these special cells burst, releasing the sebum to travel through the hair follicle shaft or duct and onto the surface of the skin or scalp.