Which modality is most appropriate for reducing swelling and pain during the first 24 to 48 hours after an acute soft tissue injury?

• A. Cryotherapy
• B. Thermotherapy
• C. Ultrasound
• D. Electrical stimulation

Answer: (A)

Cold therapy is the best choice for the first 24 to 48 hours after an acute soft tissue injury because it directly dampens the initial inflammatory response and eases pain. Applying a cold stimulus causes vasoconstriction, which reduces blood flow and capillary permeability, helping limit edema formation. It also lowers tissue metabolism and slows nerve conduction, providing analgesia and reducing pain perception. In practice, cold packs or ice are applied briefly (about 10–20 minutes) and repeated as needed, with the area protected and elevated if possible.

Thermotherapy would worsen swelling early on by increasing blood flow and tissue temperature. Ultrasound is more for tissue healing later and can risk increasing inflammation if used too soon. Electrical stimulation can aid pain relief in some cases but doesn’t address swelling as effectively as cryotherapy in the acute phase.