Face icing and ice rolling
Cold makes blood vessels shrink, so icing your face really can calm puffiness and redness for a little while. That part's true. What it doesn't do is make any lasting change to your skin; dermatologists use cold as a medical tool, not an anti-aging trick. The one real caution: too much cold, or ice straight on bare skin, can cause a cold burn or frostbite. Keep a cloth between ice and skin, keep it brief, and enjoy the quick refresh.
what the evidence says
Cold causes temporary vasoconstriction with no proven lasting skin benefit; AAD and clinical references note frostbite and cold injury are real risks when cold is overdone. Framed as a caution about technique, not toxicity.
sources
note:Skinformed is general education, not medical advice. It doesn't know your skin, can't diagnose anything, and is no substitute for a clinician. If something on your skin hurts, spreads, or worries you, that's a doctor visit, not a product search.