I've been dealing with a fair amount of fatigue lately, and have mostly been chalking it up to stress. And so it was much to my surprise when the doctor's office called and said that the blood work from my physical last week showed a chronic low grade infection. I'd say "asymptomatic", but fatigue is exactly what you'd expect. They're starting me on ten days of antibiotics.
Huh. This will be a controlled experiment as to whether modern medicine beats "suck it up, cupcake". I look forward to the results with a keen scientific curiosity.