I think it's the ADHD response to depression and anxiety. When you find it hard to develop good self-care habits that come naturally to others even in times of sadness or stress, an overwhelming sense of nihilism or fear can make even simple tasks seem far too daunting.

Here's the postcard the cover was based on.
Jenny Nicholson had a good video about this a while back.
A bundle?
And ras al hanout