Multiple-Ability Overexertion Syndrome

Multiple-Ability Overexertion Syndrome, commonly abbreviated as MAOS, is a condition where the individual has too much mana in their body, manifesting in 1) very potent abilities, or 2) multiple potent abilities, which can both put an enormous amount of strain on the body. Its symptoms vary greatly due to the wide variation of possible abilities, but they usually manifest in signs and symptoms associated with chronic fatigue.
The individual suffers from chronic fatigue, gradually-worsening physiological/mental health, and varying symptoms depending on the nature of one’s superhuman abilities due to high Dynamium levels in their bodies as manifested by having unusually-potent abilities (most commonly occurring with C3-C4 level superhumans) and/or having many distinct abilities at once. 
The terminology is a topic of debate in terms of accuracy as it only specifically refers to the status of possessing multiple abilities when the disorder may also involve only one particularly potent ability or an extreme excess of blood mana, but it just kind of stuck anyway.