When a pimple or blemish turns white after applying hydrogen peroxide, it is caused by a chemical oxidation reaction and localized micro-trauma to the skin tissue. Hydrogen peroxide is a strong oxidizing agent that releases oxygen bubbles upon contact with organic matter, bleaching the skin pigment and oxidizing the surface sebum or pus. Furthermore, the harsh chemical action causes mild cellular damage to the delicate outer layer of the skin, turning the surface tissue temporarily white. Verification: Avoid applying harsh hydrogen peroxide to blemishes, as it can damage healthy skin cells and delay natural healing.
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