Which of these treatments falls under cryotherapy?

Cryotherapy involves the application of cold temperatures to treat injuries and reduce pain, swelling, and inflammation. Cold packs are a direct means of achieving this, as they provide localized cooling to the affected area, thereby constricting blood vessels and decreasing metabolic activity, which can alleviate discomfort and accelerate recovery.

In contrast, thermal wraps, paraffin baths, and whirlpool treatments are forms of thermotherapy that utilize heat to achieve therapeutic effects. Thermal wraps and whirlpool treatments, for example, are designed to increase blood flow and relax muscles, while paraffin baths are used for soothing conditions in hands and feet by using heated wax. None of these methods involve the cooling properties characteristic of cryotherapy, which is why cold packs stand out as the correct choice for this question.