Which statement about cryotherapy depth is true?

• A. The depth is typically 0.5-1 cm
• B. The depth is typically 2-3 cm
• C. The depth is typically 3-4 cm
• D. The depth is typically 4-5 cm

Answer: (A)

Cryotherapy mainly cools superficial tissues; the cooling effect diminishes quickly with depth because skin, fat, and underlying tissues insulate and blood flow rapidly carry heat away. With common modalities like ice packs, cold sprays, or cold baths, the temperature drop is concentrated in the first millimeters to about a centimeter beneath the surface. That shallow penetration is why estimates of depth around 0.5 to 1 cm best reflect what’s typically achieved. Deeper targets, such as deeper muscle, generally don’t reach the same cooling levels with standard cryotherapy alone, no matter how long the exposure lasts, which is why the deeper depth options aren’t considered accurate for typical treatment.