Baker's Cyst Information

Last updated on 27 April 2021 by Danniel Jacques (B.Med.Sci UNSW)

What is a Baker’s Cyst?

Baker's Cyst

A baker cyst is a painful condition which can be characterised by swelling in the back of the knee.

This swelling occurs due to inflammation in the synovial joint which encapsulates the knee resulting in the out-pouching of fluid into a little balloon type sac from the synovial lining.

When this condition develops, synovial fluid (which is normally contained in a tough capsule that encases the knee joint) collects in the baker’s cyst and bulges behind the knee.

This is also called a “popliteal cyst” as it directly affects the popliteal region of the knee (that shallow depression located behind the knee joints).

If left untreated it is possible for it to rupture. A ruptured baker’s cyst may then cause the collected synovial fluid to transfer and travel down the calf muscles of the legs. This can then trigger rapid swelling and discomfort of the leg which may then cause further complications.

What Causes a Baker’s Cyst?

Baker’s cysts are quite common and can be caused by nearly any joint-related inflammation. Some of the most common causes may include;

  • A micro tear in the knee’s meniscal cartilage
  • Repetitive stress injury.
  • Wear & tear in the knee (which is more common in older adults)
  • Injury to the anterior cruciate ligament of the knee (ACL injury)
  • Sports-related injury that affects the knee
  • The type of work that a person does may also make them more susceptible. This include jobs that involve being on your knees, such as a gardener or carpenter. Also such jobs that require long shifts without sitting or unusual weight loading through the knees such as nursing.

A baker’s cyst is also know as a >> popliteal cyst

What are the Symptoms of a Baker’s Cyst?

Symptoms may include visible swelling or protrusion on the back of the knee (which can be either with our without pain), constant and prolonged knee pain, and tightness at the back of the knee or simply a feeling of tenderness at the back of the knee.

If left untreated a baker’s cyst may actually rupture. A ruptured or burst baker’s cyst can cause a lot of pain and discomfort and can present very similarly as a blood clot as there will also often be calf related pain.

How is a Baker’s Cyst Diagnosed?

It is always best to visit a qualified medical professional if you suspect that you have either a baker’s cyst or feel that your baker’s cyst may have ruptured or burst.

Your doctor will likely require you to have an ultrasound which will be able to confirm a diagnosis of baker’s cyst and also importantly rule out or alert the doctor of any existence of a blood clot.

If there is an infection suspected then a blood test and maybe an aspiration of the synovial fluid may be required for testing and culturing. In some cases an x-ray and or MRI may also be required to rule out any co-exist conditions that may have contributed to the condition.

Next Page: Learn the answers to the most common questions asked about treating a baker’s cyst, including:

Testimonials

Real accounts by real people. Hear what they have to say!

Bakers cyst on the knee

I got the patches yesterday evening. I have had five knee operations on my right knee and have arthritis. I also have a bakers cyst on the back of my knee and off to the front. I tried it last night and I was surprised at the results and it actually took away some of the swelling. I work out every other day and I think these will help.

Thanks

Leo J
Alabama, United States
Knee Baker's Cysts and Meniscus tears

I’ve had knee problems for 3 decades and have had 4 surgeries due to an ACL Tear and numerous Meniscus tears.  Due to these problems, I’ve had a chronic problem with a Baker’s Cist in back of my knee.  I’ve been living with the Baker’s Cyst for years and the swelling that this Cyst caused […]

William M
California, United States
Baker's cyst

Hi Toky, Thank you very much for sending the patches to Ukraine. My mother finds them very helpful and asked if I could get her more. Regards.

Vitaliy V
Ternopil Region, Ukraine
Baker's cyst

Dear Sir or Madam: I purchased the OSMO patch several weeks ago and just started using them 4 days ago for my Bakers Cyst behind my knee.  I must admit I was very skeptical but I have noticed a change and less swelling in the area behind my knee.   Thank you

Karen B
Illinois, United States
Baker's Cyst

I’ve had bakers cyst under my knee cap for 5 years and I’ve been in constant agony and haven’t been able to bend my knee for 5 years all my doctor could come up with was sticking needles under my knee cap, but 3 days on patches and it’s amazing swelling has almost gone pain […]

Steve J
Denbighshire, UK
Baker's cyst

Hi there! I’ve been wanting to write you about your product, OSMO Patches, but couldn’t find an email address for comments. While deleting emails way back from January 2010, I found this confirmation of my order from your company, so I hope you will relay this email! I have a bakers cyst on the back […]

Terry M
Oregon, United States
Baker's cyst

I received the patches. Thank-you. I am happy with the results and will use this product in the future. Thanks,

Kevin G
Arizona, United States
Swelling in the knee & arthritic pain in the knee

Dear Danniel,

I completed the OSMO Patch treatment and have found it to be very beneficial in that it has eliminated the swelling in my knee and has minimized the arthritic pain also present in my knee.  I consider it to be a very good treatment for reducing or totally eliminating swelling of an area.  I highly recommend its usage.

Mae A
New Jersey, United States
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