Sebum is made up of triglycerides, free fatty acids, wax esters, squalene, cholesterol esters, and cholesterol. The oil on the surface of the skin isn't just made up of sebum, however. It also includes lipids from skin cells, sweat, and environmental matter. Sebaceous glands can be found almost everywhere on the body, except on the palms of the hands and the soles of the feet. There is a greater concentration of sebaceous glands in the middle of the back, the genital area, and the face—particularly the forehead and the chin. Most sebaceous glands are connected to a hair follicle , although some open up directly to the surface of the skin, like the glands on the eyelids and the preputial glands and Fordyce spots on the genitals and upper lip. Before sebum makes its way to the surface of the skin, it combines with cells that are in the process of being sloughed off inside the hair follicle.
How Your Skin Produces Sebum
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Hi Dr. I have an ongoing problem. My scrotum and groin on both sides are very itchy. I have already seen a dermatologist.
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It coats, moisturizes, and protects your skin. So, what exactly is sebum made up of? If you have very oily skin, your body may be producing an excess amount of the mixture of lipids fat-like molecules that make up sebum. It also contains a mixture of sweat, dead skin cells, and tiny particles of pretty much whatever else is in the dust floating around you.