Oil, or sebum, is produced by sebaceous glands and secreted through pores, and if your glands secrete excess oil, there's not much you do to stop it. You can, however, control it. There are cleansers, astringents and other treatments that can help keep your face sheen-free.  Sebaceous hyperplasia is a common benign growth which occurs on the face in adults. It is due to an enlargement of the sebaceous glands (oil glands). It is common to have one or two, but a few people can have a dozen or more due their genes. This appears as a faint yellow small bump on the skin, usually between 2 to 5mm in size. If one looks closely, a small central pore can often be seen.  Acne is a disorder of the hair follicles and sebaceous glands. The glands become clogged, leading to pimples and cysts. The sebaceous glands produce sebum that normally travels via hair follicles to the skin surface. However, skin cells can plug the follicles, blocking the sebum coming from the sebaceous glands. When follicles become plugged, skin bacteria (called Propionibacterium acnes, or P. acnes) begin to grow inside the follicles, causing inflammation. The keratin is the thick, yellow substance that sometimes drains from the cyst. This abnormal growth of cells may be due to a damaged hair follicle or oil gland in your skin. Many people refer to epidermoid cysts as sebaceous cysts, but they're different. True sebaceous cysts are less common. They arise from the glands that secrete oily matter that lubricates hair and skin (sebaceous glands).  In humans, they are found in the greatest number on the face and scalp, and are also found on all parts of the skin except the palms of the hands and soles of the feet. The type of secretion of the sebaceous glands is referred to as holocrine. In the eyelids, meibomian glands, also called tarsal glands, are a type of sebaceous gland that secrete a special type of sebum into tears. Fordyce spots are ectopic (misplaced) sebaceous glands found usually on the lips, gums and inner cheeks. The structure consisting of hair, hair follicle, arrector pili muscles, and sebaceous gland is an epidermal invagination known as a pilosebaceous unit. Sebaceous glands are also found in hairless areas (glabrous skin) of the eyelids, nose, penis, labia minora, the inner mucosal membrane of the cheek, and nipples. Sebaceous Glands. Sebaceous glands are exocrine glands that release sebum. These glands are connected with the hair follicles, and sebum is released through the same pore through which hair grows in most cases. Sebaceous glands are located on every surface of your skin, with the exception of your palms, bottom lip and the soles of your feet. (Which is a good thing. Function of Sebaceous Glands. Sebaceous glands function by producing and releasing sebum in order to help protect and lubricate the surface of the skin. Sebum is composed of fat, cellular debris and keratin. This lubrication helps to keep our skin from drying out and becoming susceptible to cuts. The sebaceous glands are found throughout all areas of the skin except the palms of the hands and soles of the feet. There are two types of sebaceous gland, those connected to hair follicles, in pilosebaceous units, and those that exist independently. The structure consisting of hair, hair follicle, arrector pili muscles, and sebaceous gland is an epidermal invagination known as a pilosebaceous unit. Sebaceous glands are also found in hairless areas (glabrous skin) of the eyelids, nose, penis, labia minora, the inner mucosal membrane of the cheek, and nipples. Sebaceous glands produce oil called sebum that moves up hair follicles to the surface of the skin, where the oil lubricates skin and hair. The gland may keep producing oil when the opening is blocked, leading to a pimple. Watch the animation to learn more about sebaceous glands. A Honor Society of Nursing (STTI) answered. Sebaceous glands produce an oil called sebum, which is thought to play a role in keeping your skin moist. Sebaceous glands are located next to individual hairs in sebaceous follicles. The hormones that cause body changes at puberty also cause the sebaceous glands to produce more oil. If this oil mixes with dead skin cells and blocks a pore, it can produce a pimple
http://health.howstuffworks.com/skin-care/information/skin-types/oily-skin.htm http://www.aocd.org/?page=SebaceousHyperplasi http://dermatology.columbia.edu/conditions/acne.html http://www.mayoclinic.org/diseases-conditions/sebaceous-cysts/basics/causes/CON-20031599 https://en.wikipedia.org/wiki/Sebaceous_gland http://study.com/academy/lesson/what-are-sebaceous-glands-definition-function.html https://en.wikipedia.org/wiki/Sebaceous_gland https://www.sharecare.com/health/functions-of-skin/what-do-sebaceous-glands-do
do sebaceous glands regrow