When using cryotherapy versus thermotherapy in injury management, which statement is correct about timing and cautions?

• A. Cryotherapy is used in the acute inflammatory phase to reduce pain and swelling; thermotherapy is used in subacute to chronic phases to improve tissue extensibility and blood flow; cautions include avoiding cold hypersensitivity, nerve/vascular compromise, or sensory loss; thermotherapy should be avoided in acute injuries or when inflammation is present.
• B. Cryotherapy is never used after injury; thermotherapy is used for all injuries with no cautions.
• C. Cryotherapy increases tissue temperature; thermotherapy decreases it.
• D. Thermotherapy is preferred in the acute phase; cryotherapy is avoided due to vasodilation.

Answer: (A)

The timing of modality choice is about matching cold vs heat to the healing stage. Cryotherapy helps in the acute inflammatory phase because cooling reduces tissue temperature, which leads to vasoconstriction, lowers metabolic demand, slows nerve conduction, and diminishes pain and swelling. That’s why it’s used early after injury. In contrast, thermotherapy is useful in the subacute to chronic phases because warming increases tissue temperature, promoting blood flow, tissue extensibility, and joint mobility, which supports ongoing healing and function.

Cautions with cold include cold hypersensitivity or intolerance, numbness or altered sensation, and signs of nerve or vascular compromise, and you protect the skin from cold injury. With heat, avoid applying it during the acute/inflammatory phase or when active inflammation is present, and be mindful of overheating, impaired sensation, or vascular issues.

Why the other statements don’t fit: cryotherapy is not never used after injury; thermotherapy is not appropriate for all injuries without cautions; cryotherapy does not increase tissue temperature; and thermotherapy is not generally preferred in the acute phase because heat can worsen inflammation.