Which type of light therapy is commonly used to manage pain?

• A. Infrared
• B. Ultraviolet
• C. Visible Light
• D. Blue Light

Answer: (A)

Infrared light therapy is used for pain because its wavelengths penetrate deeper into soft tissue, producing a warming effect that relaxes muscles, reduces stiffness, and increases blood flow. This helps relieve pain and supports healing in conditions like strains, tendonitis, and back pain. The warmth and enhanced circulation can lessen muscle spasm and improve tissue metabolism, which is why infrared is a common choice for pain management.

Ultraviolet light mainly affects the skin surface and carries risks such as burns and skin damage, so it isn’t used for managing pain. Visible and blue light don’t reach deep tissues effectively, so they don’t provide the same analgesic or tissue-heating benefits as infrared.