Quintana Roo Dunne was born in New York City on March 3, 1966, and was adopted later.

Didion documents a nervous breakdown in the summer of 1968 in the title essay of The White Album.

She was diagnosed with an attack of vertigo and nausea after undergoing a psychiatric evaluation.

In addition, she was diagnosed with multiple sclerosis. 

Didion revealed in her essay “In Bed” that she suffered from chronic migraines.