I know that Graves Disease can have symptoms that mimic psychiatric disorders (anxiety
, psychosis, mania, irritability, etc...). What other physical
illnesses have symptoms
that mimic psychiatric illnesses? In other words, if someone suddenly begins to behave quite differently than they have in the past what ailments/illnesses/conditions/diseases should they be checked for to ensure that they have not been misdiagnosed with a psychiatric problem they do not have?