Post-Exertional Malaise (PEM)
Post-exertional malaise, commonly referred to as PEM, is a condition characterized by a state of weakness and discomfort that occurs after engaging in physical or mental activities. According to medical definitions, the malaise and weakness persist for a minimum of 24 hours following exertion. PEM is considered one of the primary symptoms associated with Chronic Fatigue Syndrome (CFS) and is known to be extremely debilitating. Individuals who experience PEM often describe it as a combination of fatigue and achiness, accompanied by symptoms similar to those of the flu, such as brain fog. This condition typically arises after a period of intense physical or mental exertion, such as participating in a hike or taking an exam. In some instances, the onset of PEM may take a few days to manifest and can persist for extended periods, ranging from days to weeks.
Sensitivity to External Stimuli
Individuals who suffer from Chronic Fatigue Syndrome (CFS) often experience heightened sensitivity to various external stimuli, including sounds and smells. The presence of a bright advertisement or a sudden loud noise can easily irritate someone with CFS, potentially leading to symptoms such as headaches and vomiting. To alleviate this sensitivity, individuals may find relief by using eye masks and earplugs. Additionally, some people opt for better-insulated walls and light-blocking curtains to create a more soothing environment.