Cryotherapy is used primarily to reduce which of the following?

• A. To promote wound healing through heat
• B. To increase blood flow
• C. To reduce acute pain and swelling
• D. To promote muscle growth

Answer: (C)

Cooling tissue after an acute injury lowers the tissue temperature, which slows inflammatory processes and dulls nerve signals. The main goal of cryotherapy is to reduce acute pain and swelling. By causing vasoconstriction, it decreases blood flow to the injured area, limits fluid leakage into surrounding tissues, and slows cellular metabolism, all of which help minimize swelling and secondary tissue damage. The cooler environment also slows nerve conduction velocity, providing analgesia and reducing muscle guarding.

This approach contrasts with heat-based methods, which promote blood flow and metabolic activity and would not be appropriate in the very early injured phase. Cryotherapy does not promote muscle growth; its primary benefit in this context is pain and swelling reduction, not hypertrophy.