What is a whitehead or blackhead?

A whitehead or Inclusion cyst

Sebaceous cyst.
Carbuncle.
Furuncle.
Inclusion cyst.

What is a blackhead?

Inclusion cyst that is exposed to the air causing the white material to oxidize making it turn black.

Sebaceous cyst.
carbuncle.
Furuncle.
Inclusion cyst.
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