An imbalance or abnormal mixture of bodily humors or elements, historically believed to cause illness; now used to mean a disordered or abnormal condition.
From Greek dys- (bad, difficult) + krasis (mixture, temperament). In medieval medicine, dyscrasia referred to imbalances in the four humors (blood, phlegm, yellow bile, black bile). The term evolved from a literal medical theory to a general term for any constitutional imbalance or disorder.
Ancient doctors actually had a pretty sophisticated concept here—they understood that health involved balance, even if they were wrong about what needed balancing. The idea that disease comes from imbalance is still central to modern medicine, just with different mechanisms like hormones and neurotransmitters.
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