Non-thermal ultrasound is true about its effects: which statement is true?

• A. It increases acute inflammation
• B. It can promote pain relief and wound healing
• C. It cannot affect bone healing
• D. It always heals injuries within minutes

Answer: (B)

Non-thermal ultrasound works through mechanical effects from pulsed energy rather than by heating tissue. Those mechanical actions—like microstreaming and stable cavitation at the cellular level—can influence cellular activity, inflammation, and tissue repair processes. Because of this, it can promote pain relief and wound healing by supporting healing mechanisms and improving tissue perfusion and cellular function. It can also affect bone healing; low‑intensity pulsed ultrasound has clinical use in accelerating fracture repair. It does not provide immediate, minutes‑long cures, and it is not intended to increase acute inflammation. So the statement that best fits is that non-thermal ultrasound can promote pain relief and wound healing.