A bursa is a fluid-filled sac that functions as a gliding surface to reduce friction between tissues of the body. Bursae are found near joints, especially where tendons attach themselves to the bone. Healthy bursae create a smooth, almost frictionless gliding surface making normal movement painless.
Bursitis is a condition where the bursa becomes inflamed. This may cause the bursa to become painful. It may also swell up leading to an obvious lump. This is less common in the hip due to the bursae being covered by overlying muscles.
There are a number of bursae around the hip joint.
- Trochanteric bursae (superficial and deep – closer to skin and further away from skin)
- Iliopsoas bursae
- Gluteus Medius bursae
- Ischiogluteal bursae