Which of the following is a precaution when applying cryotherapy?

• A. Over superficial main branch of nerve
• B. Normal skin with intact sensation
• C. Regular activity without restrictions
• D. Adequate hydration prior to treatment

Answer: (A)

When using cryotherapy, the biggest safety concern is protecting tissues that can be damaged by extreme cold, especially nerves that lie close to the surface. Cooling a superficial main nerve can rapidly lower its temperature, slow or block nerve conduction, and potentially cause nerve injury or neuropathic symptoms like numbness or tingling. That’s why avoiding placement of the cold source over a superficial nerve is the precaution being tested. In contrast, normal skin with intact sensation isn’t itself a precaution; it simply indicates a typical scenario where precautions would still be followed. The other options aren’t specific safeguards for cold therapy and don’t address the risk to superficial nerves.