We live in an age of diagnosis. The advance of sophisticated genetic sequencing techniques means that we may all soon be screened for potential abnormalities. The internet provides a vast array of information that helps us speculate about our symptoms. Conditions like ADHD and Autism are on the rapid rise, while other new categories like Long Covid are driven by patients themselves.

When we are suffering, it feels natural to seek a diagnosis. We want a clear label, understanding, and, of course, treatment. But is diagnosis an unqualified good thing? Could it sometimes even make us worse instead of better?

Through the moving stories of real people, neurologist Suzanne O'Sullivan explores the complex world of modern diagnosis, comparing the impact of a medical label to the pain of not knowing. With scientific authority and compassionate storytelling, she opens up new possibilities for how we might approach our health and our suffering.