Bursa

A bursa is a small, fluid-filled sac that acts as a cushion between a bone and other moving parts, such as muscles, tendons, or skin. Bursitis occurs when a bursa becomes inflamed. People get bursitis by overusing a joint. It can also be caused by an injury. It usually occurs at the knee or elbow. Kneeling or leaning your elbows on a hard surface for a long time can make bursitis start. Doing the same kinds of movements every day or putting stress on joints increases your risk.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

Source: MedLinePlus (NIH)1

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References

  1. Source: MedLinePlus (NIH): medlineplus.gov/ bursitis.html
  2. Source: MedLinePlus (NIH): medlineplus.gov/ woundsandinjuries.html

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Note: This site is for informational purposes only and is not medical advice. See your doctor or other qualified medical professional for all your medical needs.