Introduction to Physical Agents for PTA Practice Test 2026 – Comprehensive All-in-One Guide to Exam Success!

Cryotherapy after injury protects tissue by lowering tissue temperature to reduce metabolic demand and limit secondary damage. Cooling slows cellular metabolism and chemical reactions, which helps prevent further tissue injury from hypoxia and inflammatory processes. The vasoconstriction that comes with cold therapy reduces bleeding and edema formation, and the slower nerve conduction provides analgesia, helping the person tolerate movement without causing additional tissue stress. Because of these protective effects, cryotherapy is used to shield tissue after injury.

It does not worsen inflammation or edema; it actually helps limit both. The changes in circulation are temporary and aimed at protecting tissue, not causing lasting impairment.