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Bursitis

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

The main types of bursitis include:

• pre-patellar bursitis - often called 'housemaid's knee'. This is quite common in people who spend a lot of time on their hands and knees.
• infrapatellar bursitis - also called 'clergyman's knee'. Here the precipitating activity is more upright kneeling.
• pes anserine bursitis - also called 'breast-stroker's knee'. It is common in swimmers.