Biofeedback is a technique that teaches individuals how to control physiological functions by using real-time data about their body. It often involves sensors that measure things like heart rate, muscle tension, and skin temperature. By providing feedback on these bodily functions, people can learn to manage stress, anxiety, and other conditions more effectively. The process typically involves a trained professional who guides the individual through exercises while monitoring their responses. Over time, this practice can help improve self-regulation and promote relaxation, making it a valuable tool in fields like psychology and physical therapy.