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Friday, April 6, 2018

Blackheads: Causes, Symptoms, and Treatments
src: www.healthline.com

Blackhead can refer to:

In biology:

  • Blackhead, a blocked sweat/sebaceous duct of the skin known medically as an open comedo
  • Blackhead disease, which affects poultry

In history:

  • Brotherhood of Blackheads, a military order of unmarried merchants in historical Livonia

Source of article : Wikipedia