I made this playlist last night. I've not really found any good hangover playlists on 8tracks at all. A good hangover playlist should be sort of woozy and dreamy, chillwave and shoegaze are good, but I tried not to make it to heavy on any particular genre, also it shouldn't be too depressing or sad, you're hungover because you (hopefully) had a good time (i found some that had Bon Iver and James Blake on, it was all wrong!) also NO ABRASIVE NOISES, (this should be amazing, if it wasn't for the bit at the end which isn't good for a weary brain), lyrical content should be sort of relevant in that it shouldn't be about regret or doing something other walking to mcdonalds, or dwelling too far in the past, any explicit reference to alcohol might make you feel all queasy again, most of the songs are about the present, enjoying who you're with and what you've done also I don't know about anyone else but I like a sort of otherwordly transcendence theme when I'm hungover, maybe cause I feel all world weary and a need to get out of my own body, anyway, that might explain this one (I also considered the space-y and the existential but they didn't fit the 'flow' of the playlist & got cut). Finally don't just base it on song title (e.g. this or that) just because the title fits, doesn't mean you want to listen to it when you're hungover (too upbeat).
ANYWAY. The moral of the story is its hard to make a hangover playlist, just listen to mine.

[the playlist art is by Agnes Montgomery I chose it because it was beautiful and no other reason was needed (also have you tried to find an image representing hangovers? Almost as impossible as making a playlist about them)]
[I wrote out the playlist by hand but my scanner broke so this hideous paint affair was my attempt to recreate it. It looks like it was written on a scroll in Lizzy the First's day, but w/e]