Medically reviewed by Drugs. Last updated on May 4, Sebaceous cysts are small lumps that arise within the skin on the face, upper back and upper chest. A sebaceous cyst can form when the opening to a sebaceous gland becomes blocked. The oily substance called sebum continues to be produced but cannot escape to the outer skin surface. The cyst may remain small for years, or it may continue to get larger.
How to Get Rid of a Sebaceous Cyst Fast, Naturally without Surgery
Fordyce spots also termed Fordyce granules   are visible sebaceous glands that are present in most individuals. They are not associated with any disease or illness, nor are they infectious but rather they represent a natural occurrence on the body. No treatment is therefore required unless the individual has cosmetic concerns.
Back to Health A to Z. A skin cyst is a fluid-filled lump just underneath the skin. It's common and harmless, and may disappear without treatment. It can be difficult to tell whether a lump is a cyst or something else that might need treatment.