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How to shrink pimples
Ice the pimple.
Ice reduces swelling and redness in any kind of inflammation, and icing a pimple for one to two minutes can reduce both size and redness. Ice is especially helpful for shrinking cystic pimples that are deep under the skin.
Be careful, though: applying ice directly to the skin can cause damage, especially to the face. Always insulate the ice with a thin cloth or paper towel, and do not leave the ice on for more than two minutes.