Some of the many common causes of ache behind the knee (posterior knee pain) include, Baker's cyst, arthritis, infection, injury, tumor, or deep vein thrombosis.

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Since the knee is the largest and most complicated joint in the body, it makes sense the it could hurt sometimes. Although knee ache is a usual complaint, that is less usual behind the knee.

Pain in the earlier of the knee is called posterior knee pain, and also it can have a range of causes. Occasionally, posterior knee ache is "referred" native the former of the knee or the spine.

Since several problems can reason pain behind the knee, the symptoms have the right to vary. The most usual symptoms include:

Varying varieties of pain

The pain deserve to be sharp, dull, or burning. It may come on all of sudden or gradually. It may be constant, or it may occur when you put weight ~ above the leg or when you bending the knee. This details can aid a medical professional diagnose your knee problem.

Swelling or stiffness

The knee might look swollen or misshapen. You might be unable to bend the knee, or your knee may pop, lock up, or collapse when you put weight on it. This symptoms usually show that you have sustained an injury, yet there are other possibilities as well.

Redness or warmth

Under particular circumstances, the back of her knee can feel hot to the touch, or redness can be visible. Friend might also have a fever. These symptoms would point to a different reason than if you only have actually pain.

Causes of pains behind the knee

Pain behind the knee have the right to be straightforward or challenging to diagnose, depending on the cause. Here are few of the many common causes of posterior knee pain:

Baker's cyst

A lump-like ede behind the knee is characteristic of Baker's cyst, do it relatively easy come diagnose. This kind of cyst is additionally called a popliteal cyst because it is located in the popliteal fossa, a small hollow at the earlier of the knee.

It develops when synovial liquid gathers in ~ the earlier of the knee. Injury or stress from arthritis can cause the buildup of fluid.

Different forms of arthritis

Arthritis is the generic name offered to illness that influence the joint. Arthritis can reason pain everywhere in the knee joint, consisting of the back.

Knee pain is many often linked with osteoarthritis, the kind that is pertained to aging or overuse. Knee ache can likewise occur v rheumatoid arthritis, however it will take place in both knees at once.

Gout is a kind of arthritis that very first attacks the big toe, yet later assaults may strike the knees. Septic or transmittable arthritis is brought about by an epidemic that lodges in a joint, commonly a knee.


Besides epidemic in the knee share (infectious arthritis), posterior knee pains could result from several various other infections, including:

These infections have various causes and also symptoms, although pain, redness, heat, and also swelling are typical of most infections.


Damage come a muscle, tendon, ligament, or other connective organization could reason posterior knee pain. Together injuries have the right to be acute or caused by overuse. Hamstring injuries, meniscus tears, and also injuries to the posterior cruciate ligament (PCL) are three injuries the may reason pain in the ago of the knee.


It is rare that knee pains is led to by a tumor, however both malignant and also benign tumors can happen near the knee. Three species of cancer that could reason posterior knee pains are:

Synovial sarcoma, a misnamed cancer developing in big joints that doesn't actually happen in synovial fluidDeep vein thrombosis

Deep vein thrombosis (DVT) is led to by a blood gerean deep in a vein. In many cases, the clot is in the pelvis, thigh, or calf, but it can cause pain anywhere in the leg, consisting of the ago of the knee.

DVT have the right to be a life-threatening condition. If part of the blood clot breaks loosened and travel to the lungs, it can block blood flow. If the clot continues to be in place, the can damage the valves in the veins, leading to pain, swelling, ulcers, and serious symptoms.

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A physical test is of major importance in diagnosing posterior knee pain indigenous injury or arthritis. The doctor will manipulate the legs to examine rotation, flexion, and stability and to check out which movements reason pain.

The physician may additionally use imaging measures such together ultrasound, X-ray, CT, arthrography, and also MRI. Sometimes, the doctor will attract fluid indigenous the knee for activities examination.

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The medical professional will use physical examination, rap studies, and imaging if they doubt an infection, tumor, or DVT. A doctor have the right to usually diagnose a Baker's cyst by sight, but they might confirm the diagnosis with an imaging procedure.