Posterior Knee Pain

Pain behind the knee can come from several different structures, and figuring out which one is the key to getting it sorted. Our Burlington clinic can help.

Why the Back of Your Knee Deserves More Attention

Pain behind the knee is one of those complaints that tends to get lumped under the general umbrella of “knee pain,” but the back of the knee is actually a busy intersection of muscles, tendons, ligaments, and other structures that each have their own way of causing trouble. The popliteal fossa, which is the soft area you can feel behind the knee when it is slightly bent, is where a lot of this activity converges. When something in that space gets irritated, the pain can range from a dull ache during walking to a sharp catch with bending or straightening.

What makes posterior knee pain tricky is that it does not always point to one obvious culprit. The popliteus muscle, which sits deep behind the joint and helps control rotation, is a common source, particularly in runners and people who spend a lot of time on uneven ground. But the hamstring tendons attach nearby, the gastrocnemius (your main calf muscle) crosses the back of the knee, and structures like the posterior cruciate ligament and the menisci can refer pain to this area as well. Even a Baker’s cyst, which is a fluid-filled pocket that forms behind the knee, can be the source of that tight, pressure-like discomfort people describe.

This is something we see fairly often in people who have recently increased their activity level, whether that means picking up running, getting back into the gym after a break, or even just doing more yard work than usual. The tissues behind the knee are load-sensitive, and when the demand goes up faster than they can adapt, they let you know. The popliteus muscle is one of the most common culprits, particularly in runners and people who spend time on uneven terrain.

The good news is that most causes of posterior knee pain respond well to conservative treatment. It is rarely a sign of something serious, though certain presentations, like significant swelling, inability to bear weight, or pain that developed after a traumatic injury, do warrant a closer look. The important first step is identifying which structure is involved, because the treatment for a hamstring tendon issue looks quite different from the treatment for a Baker’s cyst or a popliteus problem.

One thing worth mentioning: posterior knee pain can sometimes be a secondary issue rather than the main one. If your hip or ankle is not moving well, the knee often picks up the slack, and the structures behind the joint may be the first to complain. That is why we always look beyond the knee itself when someone comes in with this type of pain.

Where Does Pain Behind the Knee Come From?

The back of the knee sits at a crossroads of several structures, and irritation to any one of them can produce pain in this area. Here are the most common contributors:

Popliteus muscle strain or tendinopathy from overuse or sudden rotational force
Hamstring tendon irritation where the muscles attach near the back of the knee
Gastrocnemius strain at the point where the calf muscle originates above the joint
Baker’s cyst forming from excess fluid that pools behind the knee

Posterior meniscus tears that refer pain to the back of the joint
Posterior cruciate ligament strain, often from a direct impact to the front of the shin
Referred pain from the hip, lower back, or ankle due to compensatory movement patterns
Prolonged positions like sitting with the knee bent or deep squatting for extended periods

Finding the Source Behind the Joint

The back of the knee is a relatively small area with a lot happening in it, so narrowing down the source of pain takes some detective work. We start by asking about the specifics: did it come on suddenly or build up over time? Does it feel worse with bending, straightening, or both? Is there swelling, and if so, where exactly? The pattern of symptoms often tells us more than any single test.

Hands-on examination involves palpating the structures behind the knee to identify tenderness, assessing range of motion, and testing the strength of the muscles that cross the joint. We use specific orthopaedic tests to stress individual structures, whether that is the popliteus, the hamstring tendons, the posterior cruciate ligament, or the menisci. Comparing how your knee feels in different positions and under different loads helps us piece together which tissue is driving the problem.

We also look at how you move more broadly. Posterior knee pain has a habit of showing up when something else in the chain is not doing its job properly. If your calf is tight, your hip is weak, or your ankle does not dorsiflex well, the back of the knee can end up absorbing forces it was not designed to handle. It is worth distinguishing posterior knee pain from conditions that present nearby but have a different origin, like pes anserine bursitis, which affects the inner knee just below the joint line.

If we suspect something structural that needs a closer look, such as a significant meniscus tear, a PCL injury, or a large Baker’s cyst, we may refer for imaging. But in most cases, a thorough clinical assessment gives us enough to start treatment confidently.

Sports therapist performing posterior knee pain laser therapy on patient in Burlington clinic

Settling the Pain and Building a Knee That Can Handle More

A Progressive Approach to the Back of the Knee

Treatment depends entirely on which structure is causing the problem, but the general principle stays the same: calm things down, then build them back up. Resting completely until the pain goes away is not the approach we take. Controlled movement, even in the early stages, helps maintain joint health and prevents the muscles around the knee from losing the capacity they had before the pain started.

In the early phase, manual therapy helps quite a bit. Soft tissue work targeting the popliteus, hamstrings, or calf can reduce the tension that often builds up around an irritated knee. Joint mobilization may also be useful if the knee is feeling stiff or restricted. The goal is not to fix everything in a handful of sessions; it is to create enough of a window for you to start moving and loading the knee without aggravating it.

From there, we transition into progressive strengthening, and this is where most of the long-term benefit comes from. The muscles behind and around the knee need to be strong enough to absorb the forces your activities demand. That means targeted work for the hamstrings, calves, and glutes, along with exercises that challenge the knee through its full range of motion. You can’t go wrong with strong, and the back of the knee is no exception.

For cases involving a Baker’s cyst, the cyst itself is often a symptom of something else going on in the joint, like a meniscus tear or early arthritis, rather than the primary problem. Treating the underlying cause tends to reduce the cyst over time. Draining the cyst may provide temporary relief, but without addressing the reason it formed, it often comes back. Long-term strategies like progressive strengthening and load management are often what make the real difference in keeping symptoms from returning.

Every case is unique, and recovery looks different depending on the cause, how long the pain has been present, and what your goals are. Some people improve quickly with a few adjustments to their training load. Others need a more structured rehabilitation program over several weeks. We adjust the plan as we go based on how your knee responds.

Posterior Knee Pain Treatment at Our Burlington Clinic

Pain behind the knee benefits from a coordinated approach. Our team works together to address the tissues involved and get you back to the activities that matter to you.

Chiropractic Treatment

Our chiropractors use hands-on assessment and treatment to address joint restrictions and soft tissue dysfunction behind the knee. Active Release Technique is particularly effective for the popliteus and hamstring tendons, while Graston Technique helps with chronic tissue changes that develop when pain has been present for a while.

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Massage Therapy

Our physiotherapists build individualized rehabilitation programs focused on strengthening the muscles that protect the back of the knee. Laser therapy and shockwave therapy may be used to support tissue recovery, and progressive exercise is central to every plan. If foot or ankle mechanics are contributing to the problem, orthotics may be considered.

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Physiotherapy

Our massage therapists work on the hamstrings, calves, and surrounding musculature to relieve the tension that accumulates around an irritated knee. Acupuncture may also be used to help manage discomfort and promote blood flow to the area, particularly for deeper structures that are harder to reach with manual work alone.

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The Road Back From Posterior Knee Pain

Recovery from posterior knee pain follows a progression that respects the tissue’s healing timeline while keeping you as active as possible throughout.

Easing the Load

The first step is reducing the irritation driving your pain. We use manual therapy, activity modification, and targeted mobility work to settle the knee down without pulling you away from movement entirely.

Rebuilding Tolerance

As pain decreases, we introduce controlled loading to the muscles and tendons behind the knee. Light resistance exercises and range of motion work prepare the joint for heavier demands ahead.

Strengthening the Chain

This is where we build real capacity. Progressive exercises for the hamstrings, calves, glutes, and quadriceps ensure the knee is supported from all directions, not just the structures that were hurting.

Returning to Demand

The final phase tests your knee under the conditions it needs to handle: stairs, running, sport, or whatever your daily life requires. We progress gradually and adjust based on how the knee responds to each new challenge.

Questions About Pain Behind the Knee

Posterior knee pain is not as straightforward as pain in the front or sides of the knee, which is why it tends to generate a lot of questions. Here are the ones we hear most often.

These answers provide general guidance. The right treatment for your knee depends on which structure is involved and how it responds to loading, so an individual assessment is always the best starting point.

Helping Burlington patients move better since 2005.

Why does the back of my knee hurt when I straighten it?

Pain with straightening often involves the popliteus muscle, the hamstring tendons, or a Baker’s cyst. The popliteus helps control the knee as it moves into full extension, and if it is irritated, that last bit of straightening can be uncomfortable. Hamstring tightness or tendinopathy at the attachment point can produce a similar sensation. A clinical assessment can help determine which structure is responsible.

Is posterior knee pain serious?

In most cases, no. The majority of posterior knee pain is caused by muscular or tendon-related issues that respond well to conservative care. However, sudden onset of significant swelling, inability to bear weight, or pain following a traumatic injury should be assessed promptly to rule out ligament damage or other structural issues.

What does a Baker's cyst feel like?

A Baker’s cyst typically presents as a feeling of tightness or fullness behind the knee, often more noticeable when the knee is fully bent or straightened. Some people can feel a soft lump in the popliteal fossa. If the cyst ruptures, it can cause sudden pain and swelling in the calf that sometimes mimics a deep vein thrombosis, which is why any acute calf swelling following knee pain should be evaluated.

Can posterior knee pain come from my hip or back?

Yes. The knee does not work in isolation, and pain behind the joint can sometimes be driven by issues elsewhere in the kinetic chain. A stiff ankle, weak hip, or even a lower back problem can change how forces are distributed through the knee. That is why we assess the full lower limb, not just the area that hurts.

How long does posterior knee pain take to resolve?

It depends on the cause. A mild popliteus strain may settle within two to four weeks with appropriate treatment and load management. Hamstring tendinopathy or a persistent Baker’s cyst may take longer, particularly if the underlying cause has been present for a while. Consistent rehabilitation and gradual return to activity tend to produce the best outcomes.

Should I stretch the back of my knee if it hurts?

Not necessarily. Stretching can sometimes feel good temporarily, but if the issue is a tendon that is already under excessive load, aggressive stretching may actually make it worse. A better approach is to identify the cause of the pain first and then determine whether stretching, strengthening, or a combination of both is appropriate. In my experience, strengthening tends to be more beneficial than stretching for most posterior knee complaints.