Housemaid's Knee and Baker's Knee

 
I used to have housemaid's knee on occasion. Housemaid's knee is fluid on the knee, the swelling being caused by constant kneeling or some other strain or trauma on the knee joint.
Until recent;ly I had never heard about baker's knee. According to one source, baker's knee is another name for being knock-kneed and was caused by baker's having to stand awkwardly for a long time while kneading dough. I wasn't totally convinced by that and upon investigation I found that it should really be called Baker's knee because it was a form of cyst or other damage to the knee first described by a doctor called Baker.