Sebaceous gland
Sebaceous glands are involved in skin problems such as oily skin, acne, and keratosis pilaris. In the skin pores, sebum and keratin can create a hyperkeratotic plug called a "microcomedo" which can block a pore and cause pimples. The prescription medicine isotretinoin significantly reduces the amount of sebum produced by the sebaceous glands, and is used to treat acne.