What is Cushing syndrome, the condition behind Amy Schumer's 'puffy face'?

Comedian Amy Schumer revealed internet criticism led her to seek medical advice and a subsequent diagnosis of Cushing syndrome. Schumer shares her relief upon learning it was a treatable condition and thanks her critics for prompting her to address her health issue.

What is Cushing syndrome, the condition behind Amy Schumer's 'puffy face'?
Comedian Amy Schumer revealed internet criticism led her to seek medical advice and a subsequent diagnosis of Cushing syndrome. Schumer shares her relief upon learning it was a treatable condition and thanks her critics for prompting her to address her health issue.