housemaid's knee

Etymology
So called because it used to be prevalent among housemaids, who spent time kneeling on floors to clean them.

Noun

 * 1)  swelling of the bursa before the kneecap.

Translations

 * Armenian: ծնկոսկրի բորբոքում
 * Irish: glúinteas
 * Russian: воспаление коленной чашечки
 * Swedish: skurknä