Tip - How to Cleanse a Sebaceous Cyst | eHow

A sebaceous cyst occurs when sebum, a white, oily substance produced by your hair follicle glands, collects in a closed sac beneath the surface of your skin. Although these small lumps are benign and generally painless, they are considered unsightly and can become irritated by friction from clothes or shaving. Occasionally a sebaceous cyst can...