It's hard to describe, but it isn't just about work or not being able to sit for 8 hours at a desk. It pervades the rest of your life; often, even things you want to be doing, you simply cannot get started on, because your brain is filled with distractions and you do not have the executive function to be able to stop it.

It is a syndrome rooted in physical causes, but one we don't yet fully understand.

The research is very clear though: our brains are simply different.