Baker’s Cyst: Treatment, Duration, Walking & Advice

Do you feel a small lump behind your knee, especially when you straighten your leg? It may be a popliteal cyst, also known as a Baker’s cyst.

It is often associated with osteoarthritis, a meniscus tear, or another knee injury.

In most cases, it does not require any specific treatment. But when it becomes painful, interferes with walking, or causes swelling in the calf, here’s what you can do.

Written by Nelly Darbois, a former physical therapist and science writer.

What is a Baker’s cyst?

A popliteal cyst is a fluid-filled sac located behind the knee, in what is known as the popliteal fossa. It usually forms from synovial fluid originating in the knee joint.

Imagine a small pocket that gradually fills up because the knee produces or circulates more fluid. It may remain very subtle, or it may become large enough to cause a feeling of tightness behind the knee.

For example, you may notice a small lump when you are standing with your leg straight, which becomes much less noticeable when you bend your knee. This is a classic sign of a popliteal cyst.

Some people don’t feel anything at all: in such cases, the cyst is discovered by chance during an ultrasound or MRI (and it’s nothing to worry about).

Popliteal Cyst and Osteoarthritis: Why Are They Often Linked?

In adults, a popliteal cyst often develops in a knee that already has a problem.

Knee osteoarthritis is one of the conditions frequently associated with a Baker’s cyst. A meniscal tear, trauma, or certain inflammatory conditions of the knee may also be contributing factors.

In a study of 130 people with knee osteoarthritis, 33 also had a Baker’s cyst. These patients had more symptoms at the start of the study than those with osteoarthritis without a cyst.

After conservative treatment (meaning anything other than surgery), symptoms improved at three months in both groups. At six months, however, the improvement was less pronounced in people with a cyst associated with their osteoarthritis ( Abate, 2021).

This explains why, in cases of a popliteal cyst associated with osteoarthritis, treatment does not necessarily involve focusing solely on the cyst located behind the knee.

Baker’s cyst: what treatment is available?

If your popliteal cyst isn’t causing you any discomfort, treatment is generally not necessary. Monitoring the condition may be sufficient.

If it is painful or interferes with your daily life, there are several options available:

• temporarily adjust your activities;
• treat pain and inflammation when appropriate;
• attend physical therapy sessions, specifically to receive guidance on adapting your activities;
• perform a puncture;
• treat the knee condition that caused the cyst.

Surgery is recommended much less frequently. It may be considered, for example, when symptoms persist despite conservative treatments or when a knee injury itself requires treatment.

The key point, therefore, is not to view the cyst as a completely separate issue. When a knee condition contributes to the buildup of fluid, treating that condition can help limit the growth of the cyst.

Baker’s cyst: should you rest?

Do you have a popliteal cyst and are wondering if you should stop moving altogether?

Not necessarily.

Complete rest is very, very rarely necessary. However, if an activity clearly triggers your pain or increases the swelling, it makes sense to temporarily cut back on it.

For example, if you can walk for 30 minutes without any problems but a one-hour hike causes your knee to swell significantly and causes pain behind it, you may want to temporarily shorten the duration of your outings.

The goal is to adjust your activity level based on your symptoms rather than to systematically rest your leg. Adjusting your activities is one of the non-surgical treatments recommended for a bothersome cyst.

In a study of people with osteoarthritis and a Baker’s cyst, post-treatment recommendations included, among other things:

• a temporary limitation on the use of the leg,
• then resuming light activities such as swimming or biking,
• before a gradual return to sports activities (Abate, 2021).

Can you walk with a Baker’s cyst?

Yes. Having a popliteal cyst doesn’t mean you have to stop walking.

Only if walking causes significant pain or a noticeable increase in swelling should you reduce the duration or intensity, and then gradually increase them again.

The cyst may become more painful with increased activity and may sometimes limit full flexion or extension of the knee.

Baker’s cyst and cycling: should you stop?

If you can ride your bike without significant pain or a lasting worsening of your symptoms, you don’t need to stop. The movements involved in cycling help maintain your knee’s mobility and strengthen your muscles, which is a good thing.

Conversely, if each session causes a significant increase in pain or swelling behind the knee, temporarily reduce the duration or intensity.

For example, you might be able to handle a 20-minute easy bike ride but not a one-hour ride with hills. In that case, you don’t necessarily have to give up biking altogether: you can simply limit your rides to 20–30 minutes and avoid hills.

In the study by Abate and colleagues, patients were allowed to resume light activities, such as cycling or swimming, and then gradually increase their activity levels (Abate, 2021).

How can you reduce the swelling of a Baker’s cyst?

There is no method that can quickly and reliably drain all popliteal cysts.

The first question is why the cyst formed. If there is osteoarthritis, a meniscal tear, or inflammation in the knee, this condition may continue to contribute to the accumulation of fluid.

Treatment may then include adjusting daily activities, pain management, physical therapy, and, in some cases, aspiration or injection.

Baker’s cyst and compression stockings: are they useful?

A compression stocking will not make a popliteal cyst go away.

It can be used in certain situations where the leg is swollen, but it does not treat either the swelling itself or the cause of the cyst.

On the other hand, wearing the stockings can sometimes provide relief.

How long does a Baker’s cyst last?

In particular, data are available for individuals with knee osteoarthritis who underwent total knee replacement. In this study, 85.3% of the cysts were still present approximately one year after surgery. At nearly five years, 33% were still visible; the majority had therefore disappeared during this period (Hommel, 2020).

The initial size of the cyst also appeared to play a role: smaller cysts were more likely to disappear than larger ones (Hommel, 2020).

Be careful, however, not to assume that a “normal” lifespan of five years applies here: this study involved people who had undergone total knee replacement surgery for osteoarthritis. It does not allow us to predict how long your own cyst will last.

I haven’t found any studies that provide data on how the condition progresses in the “average” person. And that’s understandable, since many “average” people with a cyst don’t necessarily seek medical attention.

Based on my experience, I believe that the discomfort associated with a cyst often lasts only a few weeks, or at most a few months.

Can a Baker’s cyst be drained?

Yes, a popliteal cyst aspiration may be recommended in certain situations.

Using a needle, the healthcare professional removes some of the fluid from the sac. The aspiration may be performed under ultrasound guidance, particularly when the anatomy or location of the cyst warrants it.

In some situations, an injection may also be prescribed.

But be aware: draining the cyst does not guarantee that it won’t come back.

If the joint continues to produce and circulate a large amount of fluid, the cyst may fill up again. Recurrences are particularly common in older adults and when the cyst is associated with degenerative meniscal lesions.

In Abate’s study, treatments used for people with osteoarthritis and a Baker’s cyst included, among other things, the removal of fluid from the cyst and, depending on the situation, injections of hyaluronic acid or corticosteroids (Abate, 2021).

A biopsy is therefore one option among others, not a standard procedure.

Ruptured Baker’s cyst: how can you recognize it?

In rare cases, a popliteal cyst may rupture.

You may then feel as if something has suddenly happened behind your knee:

• sudden pain,
• swelling of the calf,
• redness or a sensation of fluid flowing down the leg.

The problem is that these symptoms closely resemble those of deep vein thrombosis (more commonly known as phlebitis).

A journal article published in 2026 describes the rupture of a Baker’s cyst as a condition that can be mistaken for deep vein thrombosis. The authors note that Doppler ultrasound is the first-line test, particularly for detecting thrombosis. Most cases have a favorable outcome with conservative treatment (Zmerly, 2026).

A calf that suddenly becomes painful and swollen should therefore be evaluated by a doctor, rather than automatically being attributed to the rupture of a previously known cyst.

A tear is generally treated conservatively (without surgery). In cases that are persistent or recurrent,

• a desire,
• an injection,
• or other treatments may be considered.

Surgery is reserved for certain specific situations (Zmerly, 2026).

How long should you take off work for a Baker’s cyst?

The duration of any sick leave is therefore determined on a case-by-case basis by the doctor, based on your condition and your occupation, rather than on the disease or symptoms themselves. This applies to popliteal cysts as well as to any other medical condition.

There is no set duration for time off work due to a popliteal cyst.

The same cyst may not interfere with work for one person but may be very debilitating for another.

Let’s look at two examples:

• If you work primarily while sitting and your cyst causes only minor discomfort, you may not necessarily need to take time off work;
• If you work on a construction site, stand for several hours, climb stairs, and have to carry heavy loads, severe knee pain can temporarily make it impossible for you to work.

📚 SOURCES

• Abate M, 2021. Baker’s Cyst with Knee Osteoarthritis: Clinical and Therapeutic Implications. Full text available on PubMed Central
• Hommel H, 2020. The fate of Baker’s cysts at mid-term follow-up after total knee arthroplasty. Article on PubMed
• Zmerly H, 2026. “Ruptured Baker’s Cyst Demystified: Current Evidence, Diagnostic Strategies, and Treatment Options for an Under-Recognized Condition.” Full text available on PubMed Central