Inflammation of a bursa, which is a small fluid-filled sac that cushions and lubricates areas where tendons, ligaments, and muscles move over bones. This condition causes pain, swelling, and limited movement.
From Latin 'bursa' meaning 'bag' or 'purse' (referring to the sac-like structure) combined with Greek '-itis' (inflammation). The anatomical term bursa was first used in the 17th century, with the inflammatory condition described shortly after.
Bursae are like tiny water balloons strategically placed throughout your body to prevent friction - you have over 150 of them! 'Housemaid's knee' and 'student's elbow' are old names for bursitis caused by repetitive kneeling and leaning on hard surfaces.
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