{
  "what": "Sebaceous filaments are thin columns of sebum, shed skin cells and normal skin bacteria that line every pore with an active oil gland, seen as small, even grey or tan dots across the nose. They are normal, not blackheads, and they refill after squeezing because the gland beneath keeps working. At Dr Sin Yong's practice on Orchard Road, Singapore, the aim is to make them less visible with oil control and pore-normalising skincare; nothing removes them for good.",
  "key_facts": [
    "Where and why: seen mainly on the nose, chin, forehead and inner cheeks, where oil glands are large and close together; how full they look depends mainly on oil output, pore width and the support of the skin around each pore",
    "Not blackheads: filaments are uniform, flat and refill after clearing; a blackhead is a firmer, darker, often slightly raised plug that is part of acne and stays clear once cleared; an open pore is a widened opening that clearing does not change",
    "Look-alikes: closed comedones (firm skin-coloured bumps), milia (hard white dots that do not squeeze out) and sebaceous hyperplasia (soft yellowish bumps with a central dip, usually after 40)",
    "Skincare: salicylic acid reaches inside the pore and loosens its lining; a retinoid normalises how follicle cells are shed (avoided in pregnancy); niacinamide, a light non-comedogenic moisturiser and daily sunscreen support the routine",
    "What to stop: pore strips, squeezing, harsh scrubs and alcohol-heavy toners, which empty the pore briefly and can inflame or stretch it and, in skin of colour, leave dark marks",
    "Clinic options: gentle clearing on softened skin or a doctor-assessed Hydrafacial resets the pore without switching off the gland; where the pores themselves have enlarged, pico laser, FSX Laser, 少女光 (DEKA RedTouch Pro) or RF microneedling act on the collagen around the pore, not on the filament",
    "See a doctor for: dots turning into red, tender spots, yellowish bumps with a central dip, firm white bumps, dark marks or broken veins from squeezing, or a single bump that grows, bleeds or does not heal",
    "Assessed by: Dr Sin Yong personally, who first separates filaments, blackheads, open pores and texture; skincare alone is always part of the discussion"
  ],
  "references": [
    "Sebum output as a factor contributing to the size of facial pores. British Journal of Dermatology 2006;155(5):890-894. https://pubmed.ncbi.nlm.nih.gov/17034515/",
    "Facial Pores: Definition, Causes, and Treatment Options. Dermatologic Surgery 2016;42(3):277-285. https://pubmed.ncbi.nlm.nih.gov/26918966/",
    "The efficacy and adverse effects of treatment options for facial pores: a review article. Journal of Cosmetic Dermatology 2023;22(3):763-775. https://pubmed.ncbi.nlm.nih.gov/36440737/"
  ],
  "owner_url": "https://drsinyong.com/sebaceous-filaments/",
  "doctor": "Dr Sin Yong, aesthetic physician, Orchard Road, Singapore",
  "updated": "2026-10-31"
}