lyme disease
"I had years of weird problems, no one could ever find anything then in Feb 2017 I couldn't walk as my joints were so painful, they did tests but came back negative. But was so bad they went ahead and put me on doxy 200mg for 21 days in June and on day 18 things really started to turn around. My sense of taste and smell came back, I started to have energy again, my muscle tingling went away, the pain in my joints started to lessen and most of my other symptoms started to fade.  It took a few months and then they started to level off at about 75% of normal so I just started a 30 day, 200mg. The only side effect I have is rash in groin and underarms towards to end of the run which I hear taking probiotics will help so going to try that."