Non-thermal ultrasound promotes which of the following?

• A. Increased tissue edema
• B. Muscle growth
• C. Pain relief and wound healing
• D. Decreased joint mobility

Answer: (C)

Non-thermal ultrasound uses pulsed energy to deliver mechanical effects without heating the tissue. Those mechanical actions—microcavitation and acoustic streaming—increase cell membrane permeability and stimulate processes like fibroblast activity, collagen synthesis, and new blood vessel formation. This sequence supports the inflammatory and proliferative phases of soft tissue healing and often reduces pain as healing progresses. So, its primary benefit is pain relief and wound healing. It doesn’t promote more edema, doesn’t drive muscle hypertrophy, and isn’t aimed at decreasing joint mobility; the goal is to speed repair and restore function.