Life is not all fun and games. In fact it sucks pretty hard sometimes. It's hard enough when you're healthy but it's downright shitty when you're sick. Here are a few songs about disease and general poor health. Ain't that just a ray of sunshine on a Friday morning?
Some songs are funny (if a little dark) like Warren Zevon's "My Shit's Fucked Up" or Ween's "Spinal Meningitis," some are absolutely, devastatingly sad like Jason Isbell's "Elephant." Some are stone cold classics like AC/DC's "The Jack" or Pink Floyd's "Comfortably Numb."
Hopefully you live in a country with a good health care system...