Sciatica that's lasted more than two years. I wouldn't wish it on my worst enemy. In the old days they called it "witches shot" and linked it to demonic possession. That should help indicate what it can do to your mind.
pneumonia, almost died from it back in september...it was horrible
I used to think pneumonia was the sickest I've been, until I got bronchitis. Pneumonia frequently made me think I was going to die; bronchitis made me with I would just do it and stop the pain.
Swine Flu! Ah! I threw up EVERYTHING (and I do mean everything) for four weeks straight!!!!!!!!
The scariest were two types of cancer