The allergic fungal sinusitis I was diagnosed with probably had to do with my allergic sensitivity to pollen and cats, as well as all fresh fruit and most vegetables. As a psychological and social tendency, oversensitivity is familiar in popular culture as well as in the fine arts. We know a lot about high-strung individuals and their inner life, whether male geniuses, hysterical women, or something in between. In comparison, physical oversensitivity is not very well understood in medicine, culture, or society. And yet I share the condition with many other people. The World Allergy Organization states that 10 to 40 percent of the world’s population suffers from allergies. They predict that by 2025, half of the population of Europe will suffer from one allergy or another.