What do you do in biofeedback clinics?

Explain to me in detail what you do when at a clinic doing biofeedback. Thanks.

Through the help of biofeedback techniques, one learns to respond to stimuli so it will not effect them physiologically.
Electrodes or wires are placed on certain parts of the body that monitor physiological responses.
Biofeedback can be used to reduce headaches, high blood pressure, body temperature....etc. I hope this helps.

learn to relax