hypersensitivity
n. C / Un. an extreme or unusual reaction to something that most people would not find annoying. It can also mean a medical condition where your body reacts too strongly to a substance like pollen.
n. an excessive or abnormal reaction to a stimulus, such as a physical allergen or a psychological stressor. Often used in medical contexts to describe allergic responses or in psychological contexts to describe extreme emotional reactivity.
She has a hypersensitivity to loud noises.
The patient was diagnosed with a hypersensitivity to certain metals, which caused a rash every time he wore a new belt.
While some critics dismissed the author's hypersensitivity to public opinion as mere paranoia, others argued it was a necessary defense mechanism in an increasingly hostile media landscape.
From hyper- + sensitivity.