Contrary to what most people are saying on here, ice does not reduce swelling. It does reduce pain and has other therapeutic and helpful healing properties but there is no clinical evidence to support the reduction of swelling. Also swelling is not an increase of blood flow to the area but rather fluid leaking out of blood vessels into the surrounding tissue.
Source: article on the topic that sites multiple medical journals as sources https://www.clinicaledge.co/blog/5-minute-physio-tip-crushing-the-myths-of-ice-application-is-ice-useful-for-acute-injuries-and-does-it-reduce-swelling
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