Demodex Mite (Face Mite)
Scientific Name: Demodex folliculorum or Demodex brevis
Order & Family: Order: Trombidiformes; Family: Demodecidae
Size: Microscopic; typically 0.15 mm to 0.4 mm in length

Natural Habitat
Typically found in or near hair follicles of mammals; in humans, often found on the face, particularly the nose, eyelashes, and forehead.
Diet & Feeding
Sebum (oil produced by skin glands) and dead skin cells
Behavior Patterns
They are largely nocturnal, emerging from hair follicles at night to move across the skin and mate. They lay eggs inside the follicle or sebaceous glands.
Risks & Benefits
Benefits: Generally considered a commensal organism that may help clean pores by eating oil. Risks: Overpopulation can lead to demodicosis, causing skin irritation, redness, and exacerbating conditions like rosacea or blepharitis (eyelid inflammation).
Identified on: 3/3/2026