As its name suggests, the biofeedback is the feedback from different parts of our body. This technique is indicated for systemic improvement of the patient's disease or correction through various methods. The most popular are electronic devices that emit visual and auditory signals of biological changes or abnormal physiological states and on which a patient is often not aware of, such as arrhythmias or changes in heart rate, blood pressure, changes in speed pulse, etc. With these techniques the patient may be aware of some unusual conditions of his body tuning their bodily functions and thus gain control over their own states. Biofeedback is often used to treat cardiovascular, respiratory, neuromuscular, gastrointestinal, circulatory disorders, psychosomatic illnesses and stress states.