'hypersensitivity' originates from the Greek prefix 'hyper-' meaning 'over' or 'excessive' and the Latin word 'sensus' meaning 'feeling' or 'perception'.

'hypersensitivity' evolved from the combination of 'hyper-' and 'sensitivity', which was used in medical contexts to describe an excessive reaction.

Initially, it referred to any heightened sensitivity, but over time it became more associated with medical and allergic reactions.