Chronic fatigue syndrome (CFS) is a sickness or illness that is defined by both “profound as well as prolonged exhaustion.” As opposed to occasional feelings of tiredness, those suffering from CFS will not get better simply by getting an adequate amount of sleep and rest. When no other sicknesses or health conditions can be found to bring about extreme tiredness, CFS is often considered to be the culprit. Those who are suffering from CFS often experience symptoms that resemble the flu and generally find that their symptoms do not improve within a matter of days or a matter of weeks. A very common characteristic of chronic fatigue syndrome is what is known as “post-exertional malaise.” This form of malaise means that after a period of exertion an individual finds that their symptoms are getting worse especially if this occurs within a 24-hour period.