Bursitis is inflammation of a bursa, a lubricated pouch or sac in regions where there is a lot of movement between muscles and bone.

carpet-fitter

Carpet fitter's knee - knee problems may include infrapatellar bursitis.

housemaid's knee

Housemaid's knee - pre-patellar bursitis.

 

Common types of bursitis

Most cases of bursitis are of the non-infected type, and resolve on their own. The most common bursitis in the knee is pre-patellar bursitis, often seen in someone who has done uncommon exercise while kneeling, such as scrubbing a floor or fitting floor tiles. If there is any penetration of the bursa then it may become infected. Pes anserine bursitis may ocur in breaststroke swimmers.

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Synonyms: 
water on the knee
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Dr Sheila Strover (Editor)
BSc (Hons), MB BCh, MBA

See biography...