Tired all the time? Searching for a genetic link to chronic fatigue syndrome
Yawning can be highly contagious. And we are all familiar with that post-lunch energy letdown that comes after eating a big meal.
Clinically speaking, some believe it’s a central nervous system disorder, while others believe it’s metabolic, many have considered it to be infectious or post-infectious, or perhaps an immune dysregulation disorder. Some have also been proposing that ME/CFS is psychological or physiopsychological.