I can only walk to the mailbox, and I’m in a lot of pain. -- J.E. ANSWER: A Baker’s cyst is a fluid-filled sac behind the knee. In older adults, they are nearly always a result of knee damage.

Behind-the-knee pain could be due to muscle strain or arthritis—or something far more serious. Orthopedic experts say these are the most common causes.

WWE superstar Drew McIntyre shared graphic footage of the extent of his recent knee injury. Professional wrestlers often ...

synovial fluid might build up behind your knee. This buildup may form a Baker cyst, a fluid-filled sac that can cause stiffness, discomfort, or pain behind the knee. It's especially painful if the ...

It is a soft, fluid-filled lump in the popliteal fossa behind the knee. In the back of the knee, there is synovial tissue which can serve as an outlet for extra swelling within the knee and thus ...

Graphic content on next story.' That next story was a video showing a doctor using a syringe to draw a significant amount of yellow fluid from his knee. Alongside that footage, McIntyre wrote ...

If knee pain won’t stop bothering you on your ... often associated with the development of an enlarged, fluid-filled sac called the bursa, which sits between the ITB and the outside of the ...