Dysautonomia broadly refers to a problem with the autonomic nervous system, or ANS. The ANS is a special portion of the nervous system which is integral in the body’s maintenance of homeostasis, or “steady state”. The ANS controls functions of the body that occur automatically. These functions are typically outside the domain of the peripheral and central nervous system. For example, heart rate, respiratory rate, bowel motility, bladder contractility, pupil size, skin temperature and sweating are all modulated by the ANS.