In the late 1960s research showed that certain involuntary activities like brain activity, blood pressure, heart rate can be altered by tuning into our body. This was termed as Biofeedback. Simply put biofeedback is the technique of looking into the signals from our body, for example measuring one's weight or temperature are simple methods of biofeedback, as both devices feedback information about the body. Biofeedback is used in a variety of situations. It is generally used by physical therapists to help stroke victims regain movement in paralyzed muscles.
Psychologists use it to help tense and anxious clients learn to relax.
Research has demonstrated that we have more control over so-called involuntary bodily function than we once thought impossible and using the biofeedback techniques we can exercise this control. It mostly involves some form of relaxation exercise. Some people learn to identify the circumstances that trigger their symptoms. They may also be taught how to avoid or cope with these stressful events. Most are encouraged to change their habits, and some are trained in special techniques for gaining such self-control.