While exercise itself plays a significant role in muscle soreness, there are some surprising causes worth exploring. Eccentric exercise, which involves lengthening contractions, tends to induce ...

Lower left abdominal pain can have many causes, ranging from minor to serious, says Andrew Boxer, M.D., gastroenterologist of ...

But for unknown reasons, patients also experience many symptoms outside the central nervous system, such as debilitating fatigue and muscle pain ... that focus on causes outside the brain ...