Source While sebaceous cysts are mostly harmless, they are a source of annoyance, pain, and self-consciousness. The skin contains sebaceous glands that provide sebum which is a lubricating oil to keep the skin moist and healthy. When the glands are clogged by a hair follicle, the sebum builds up causing the red, puffy cyst. As … Continue reading 10 Homemade Remedies For Sebaceous Cysts