During biofeedback, a kind of mind-body medicine (mind-body medicin) electronic devices provide information about biological functions of the patient (such. As heart rate, blood pressure, muscle activity, skin temperature, skin resistance, brain surface electricity). and teach to control these functions the patient. Applications for biofeedback with the help of a therapist or exercise, the patient can then use the information from the biofeedback to alter the body’s functions or to relax so that the impact of diseases such as pain, stress, insomnia and headaches can be reduced. Biofeedback is also used in patients with fecal or urinary incontinence, chronic abdominal pain, tinnitus, Raynaud syndrome, or attention or memory disorders (eg. As attention-deficit / hyperactivity disorder, traumatic brain injury). In general, biofeedback does not seem to be helpful in asthma; one possible exception is the heart rate variability biofeedback, which can help to reduce asthma symptoms and the dose of medication, and to support lung function.