Blackheads, also called blackheads, occur when skin pores are clogged with excess sebum and dead skin cells, preventing them from closing.

In contact with the air, the sebum oxidizes and becomes black, hence the appearance of black dots. So, contrary to popular belief, it’s not dirt.;u=12188

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Last-modified: 2020-02-05 (水) 22:54:28 (261d)