Nogle af symptomerne på syndromet er: uforklarlig feber, sveden, hjertebanken, diarre, (ukontrollerede) muskelsammentrækninger, rysten, overaktive reflekser, rastløshed, humørsvingninger og bevidstløshed.
Some of the symptoms of this syndrome are: inexplicable fever, sweating, increased heart rate, diarrhoea, (uncontrollable) muscle contractions, shivering, overactive reflexes, restlessness, mood changes and unconsciousness.