Sebaceous Filament (skin plug) or Keratin Plug

Natural Habitat

Human skin, specifically within hair follicles and pores (commonly on the nose, chin, or forehead)

Diet & Feeding

N/A (Consists of sebum, dead skin cells, and bacteria)

Behavior Patterns

These are not living creatures. They form naturally as part of the skin's oil production process. They act as a wick to move oil (sebum) to the skin's surface.

Risks & Benefits

Benign. While often mistaken for blackheads or worm-like parasites, they are a normal part of skin function. Squeezing them can injure the skin or enlarge pores, but they are generally harmless.

Identified on: 2/21/2026