a cyst on the sebaceous gland or the skin. I have them; mine are (fortunately for me) almost all on the scalp hidden by hair). In practice, they are a lot like pimples that never entirely go away. They pretty much always itch, when infected they hurt a little too. They constantly form dry little caps, often with a little blackhead-like dot. Picking at them is one more way I have of fidgeting. Since they are merely a minor nuisance and are hidden by my hair, I've never had anything done about them. Treatment seldom takes permanent care of the problem, anyway.
There are many kinds of cysts and some may be serious. If the cyst grows or stays around for awhile, it is best to check in with your doctor.
A
Sebaceous (oil) glands
No, sebaceous glands have ducts.
Sebaceous cysts are not precancerous.
I had sebaceous glands on my arms
No, sebaceous glands have ducts. They are exocrine glands.
The sebaceous glands are responsible for producing oil, known as sebum, which helps to keep the skin and hair moisturized and protected. These glands are found throughout the body, with a higher concentration on the face and scalp.
A pimple, a boil (furuncle), or a sebaceous cyst.
A sebaceous cyst can look almost identical to a pimple. Most sebaceous cysts however are larger and harder than regular pimples are.
The sweat and sebaceous glands are in the dermis, not in the stratum corneum.
No, the sebaceous gland produces sebum, or skin oil.
Sebaceous glands are alveolar glands, most of which open into hair follicles. Their secretion is sebum.