Pain Behind Knee
If you're experiencing severe pain behind the knee, you're not alone. Behind knee pain (also known as posterior knee pain) is one of the most common forms of aches people experience. The knee is one of the largest joints in the human body, and also one of the most complex. Our knee anatomy is comprised of bones (the tibia also known as the shin bone, the fibula which is the smaller bone that runs alongside the tibia, the thigh bone also known as the femur, and the patella which is also known as the kneecap), tendons, muscles, cartilage and ligaments (the ACL, PCL, LCL and MCL). If these areas are aggravated, either through a direct injury or over time, then a person may experience pain behind the knee.
What causes pain on the inside of the knee?
In addition to pain behind the knees, you may also experience some of these symptoms:
- Swelling behind the knee
- A lump behind the knee
- Fluid around the knee
- Clicking knee
- Sensation that the knee is locking
It is important to note these symptoms to discuss with your physician during your visit.
The following are the most common causes of behind knee pain:
Baker's cyst - Also known as a popliteal cyst, a Baker's cyst is one of the most common causes of pain behind the knee. Throughout the body there are fluid-filled sacs called bursa which help lubricate and cushion our body parts as we move. When the bursae behind the knee (popliteal bursa) becomes inflamed, this is known as a Baker's cyst.
Arthritis - The natural wear and tear of our knee joint (osteoarthritis) or inflammation in the knee joint (rheumatoid arthritis) may cause pain behind knees. The pain may be more severe in the morning, when the joint is the most stiff.
Meniscus Tear - The menisci of the knee are the pieces of cartilage that cushions the knee joint. When the posterior portion of the meniscus is torn, it may cause pain behind the knee (or all over the knee with more acute pain toward the rear).
Other causes - Direct trauma to the knee may also cause behind knee pain. Your doctor will diagnose whether it is a knee sprain (overstretched ligaments) or a ligament tear.
Blood Clots Behind Knee
It is important to note that pain and swelling behind the knee may be associated with blood clots. Blood clots behind the knee are especially common for those on bed rest or prolonged laying down, recovering from surgery or who have experienced trauma to the knee. Age and weight may also be a factor in blood clots. If you are experiencing behind knee pain, see a doctor to diagnose your situation, especially as you may be experiencing a blood clot behind knee.
Diagnosing Behind Knee Pain
Your doctor will likely diagnose the cause of your pain behind the knee through one or more of the following assessments:
- Medical history
- Discussing your recent activities
- MRI
- X-ray
- Ultrasound
- Blood test
Treatment for Pain Behind the Knee
Behind knee pain treatment varies depending on the cause of the knee pain. Treatment may include:
- PRICE (protection, rest, ice, compression, elevation)
- Over the counter medications to reduce inflammation, such as aspirin or ibuprofen (NSAIDs)
- Wearing a knee braces
- Exercise
- Physical therapy
- Weight loss
- Cortisone injections (to reduce pain and inflammation)
- Surgery
Speak with your doctor to determine the best treatment for your behind knee pain.
Best Selling Knee Braces
-
$219.99On Sale 0% Off Save $0.00(33) ReviewsMaximum+ support for ACL, meniscus, and knee ligaments. Dual Fullstop dampening hinges and 4-strap design protect the knee and prevent hyperextension. Bilateral polycentric hinges keep knee from at-risk positions while breathable mesh and ergonomic design ensure comfort and a secure fit. Ideal for athletes and active adults.
Recommended for:
- ACL Injury
- Meniscus Injury
- MCL and LCL Protection
- Chronic Knee Instability
- Hyperextension
- Moderate Tendon Strain
- Moderate Ligament Injury
-
Special Price $77.99 Regular Price $86.99On Sale 10% Off Save $9.00(67) ReviewsMaximum support for MCL, LCL, and meniscus injuries with padded bilateral hinges and open patella buttress for added knee stability. Bilateral polycentric hinges stabilize against lateral forces and prevent hyperextension. Breathable 4 mm neoprene and ergonomic wraparound design provide comfort with a secure fit for athletes and active adults.
Recommended for:
- MCL and LCL Instabilities
- Knee Hyperextension
- General Meniscus Support
-
Special Price $86.99 Regular Price $95.99On Sale 9% Off Save $9.00(11) ReviewsModerate support with polycentric hinges for ligament stability and a natural gait. Mesh popliteal and open patella design with donut enhance comfort and targeted kneecap support. Moisture-wicking Drytex material and adjustable straps provide an ideal customized and comfortable fit. Ideal for athletes and active adults.
Recommended for:
- Mild to Moderate MCL/LCL Injuries
- Meniscus Injuries
- Knee Instability
- Sprains and Strains
- Hyperextension
- Arthritis
-
Special Price $61.99 Regular Price $68.99On Sale 10% Off Save $7.00(3) ReviewsMaximum lateral support with dual polycentric hinges for stability and improved patella tracking. Low-profile wraparound style brace with neoprene and terrycloth lining deliver breathable comfort for all-day wear. Open hex buttress provides gentle compression and kneecap stability, making this brace ideal for athletes and active adults.
Recommended for:
- Meniscus Injury
- MCL and LCL Protection
- Knee Instability
- Hyperextension
- Strained Muscles or Tendons
- Sprained Ligaments
-
Special Price $69.99 Regular Price $77.99On Sale 10% Off Save $8.00(1) ReviewEngineered for athletes who demand mobility and support. The 4-way stretch knit fabric delivers compression to manage swelling, while removable plastic hinges provide medial/lateral stability during dynamic movements. Ideal for sports like basketball, volleyball, and soccer, this lightweight sleeve offers a secure fit with adjustable straps and a patella buttress to protect the kneecap.The Hinged Knit Knee can be used to treat or prevent the following knee injuries:
- Overuse Injuries
- Patella Tracking Disorder
- Muscle Imbalance
- Strained Muscle or Tendons
- Mild Sprains
- Blunt Trauma
-
Special Price $29.99 Regular Price $33.99On Sale 12% Off Save $4.00(2) ReviewsLock In. Level Up. Dual-pull straps and removable buttresses deliver customizable patellar tracking and lateral stability. 4-way stretch knit and low-profile design keep you agile—ideal for runners, jumpers, and game-day warriors.The Deluxe Knit Knee With Stays can be used to treat or prevent the following knee injuries:
- Mild knee sprains and strains
- Inflammation
- Arthritis
- Bursitis
- Overuse Injury
- Patellofemoral Syndrome
-
Special Price $48.99 Regular Price $53.99On Sale 9% Off Save $5.00(3) ReviewsStabilize Your Stride Dual-pull straps and removable buttresses deliver customizable patellar support for peak performance. Lightweight 4-way stretch knit ensures comfort and flexibility during every workout.The Dual-Pull Patella Stabilizer Knee Sleeve can be used to treat or prevent the following knee injuries:
- Runner's Knee
- Patellofemoral Syndrome (PFPS)
- Patella Maltracking
-
Special Price $43.99 Regular Price $43.99On Sale 0% Off Save $0.00(51) ReviewsEngineered for athletes who demand support without compromise. The TriZone Knee Support combines compression and bracing in a single sleeve, featuring three strategically placed zones for enhanced stability and comfort. Crafted with carbonized bamboo for natural odor control and breathability, it's ideal for sports like basketball, running, and volleyball.The Trizone Knee Support Brace can be used to treat or prevent the following knee injuries:
- Tendonitis
- Meniscus Injury
- Muscle Strain
- Over Use Injury
- Mild Joint Instability
- Need for Compression





