Why does ice reduce swelling?
Show answer & explanation
Answer: Cold shrinks blood vessels
Cold shrinks blood vessels ✓ — Correct! Cold causes blood vessels to constrict (vasoconstriction). Less blood flow means less fluid leaks into injured tissue. This reduces swelling and inflammation. That's why RICE (Rest, Ice, Compression, Elevation) helps injuries!
Ice kills damaged cells — Wrong. Ice doesn't kill cells when used properly. It reduces blood flow and inflammation.
Cold numbs the swelling — Wrong. Numbing reduces pain sensation but doesn't directly affect swelling. Vasoconstriction does.