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I'm just thinking here. If red-marks are caused by dilated blood vessels, that are underneath the skin. Why would exfoliating the skin help with something that's under it? It just doesn't make sense to me.

Now, I understand when someone says to wear sunscreen(SPF), because the UV rays penetrate & irritate the blood vessels causing them to still be dilated, which in turn keeps the red marks visible.

Any thoughts, opinions, or persuasions?

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From About.com:

PIH develops when a wound, rash, pimple, or other stimuli causes skin inflammation, which triggers the skin to produce too much melanin. Melanin is the protein in the skin that gives the skin its color. The excess melanin darkens and discolors the wounded area. This discoloration remains even after the wound or rash has healed.

PIH is very common among acne sufferers. It can occur in all skin types, although it is more common in darker skin tones. It affects both men and women equally. Luckily, PIH is not a true scar.

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