As soon as Adam Kay set foot on a hospital ward for the first time he realised theres quite a lot they dont teach you at medical school ... His diaries from the NHS front line - scribbled in secret after long nights endless days and missed weekends - are hilarious horrifying and heartbreaking by turns. This Is Going to Hurt is everything you wanted to know about being a junior doctor and more than a few things you really didnt. And yes it may leave a scar.