I had an MRI in May. The images showed excessive fluid buildup and inflammation in the bursa, and a small incomplete tear in my rotator cuff. The tear is in line with the fibers of my cuff, much like a split in a seam. It’s unclear whether I had the tear before the shot or whether the shot caused it. I’d had no prior symptoms, and Annunziata says the shot might either have caused the tear – if the needle went into the cuff – or stirred up a prolonged inflammatory response in the area, causing the tear to become painful.