>>15875022>how did she get knee bursitis in the first place?Unreasonable amount of doggystyle sex, obviously.
Bursitis can happen to anyone for any reason. Can be an infection from a cut, can be from a hit she didn't notice, can be from suddenly overstressing that knee(she did start dance lessons recently, and dance lessons is not the same as simple cardio).
I had this shit on my elbow couple months ago, it was so bad they had to cut it open several times. Nothing life threatening but nothing pleasant either. If it's really bursitis she'll be fine.