Name a non-invasive technique commonly used in pain management.

Biofeedback is a non-invasive technique commonly employed in pain management that helps individuals gain awareness and control over physiological functions. This method involves using sensors to monitor bodily processes, such as heart rate, muscle tension, or skin temperature, and providing real-time feedback. By learning to control these automatic functions, patients can manage pain more effectively, often reducing stress and muscle tension that contribute to pain conditions.

Acupuncture, while a popular non-invasive method, traditionally involves inserting needles into the skin, which does not fit the strict definition of non-invasive if one considers the skin being penetrated. Surgery, on the other hand, is an invasive procedure that involves significant intervention. Injections are also invasive as they require needles to deliver medication into the body, making them unsuitable as non-invasive options. Thus, biofeedback stands out clearly as a technique that does not involve any physical intrusion into the body while still addressing pain management effectively.