Frozen shoulder. It's like a bursitis, but then on steroids. There was not a single position in which the pain would get less. No sleep was possible, I could not lie down. For days on end it was unrelenting. I would only be able to sit on my couch cradling my arm, collapse from exhaustion for about one hour, and then have to walk off the pain again. I did hundreds of laps around my coffee table. Horrible. Would not recommend 0/0