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The Squeeze: The blood vessels beneath the surface aggressively narrow (vasoconstriction).
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The Collapse: As blood drains out of these tiny pathways, the volume of the tissue directly underneath your skin plummets.
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The Pull: Because the outer layer of your skin stays the exact same size while the foundation beneath it shrinks, the surface gets violently pulled inward.
The result? Those deep, wrinkled trenches.