significant loss of strength, power and range of motion.bruising and swelling behind the knee and in the back of the thigh.popping/tearing sound at the time of injury.Symptoms are usually felt immediately at the time of injury and can persist for a number of weeks: There are three different grades of hamstring strain depending on how much damage there is. swelling behind the knee as the tendon thickensĪ hamstring strain occurs when one of the hamstring muscles is suddenly overloaded or overstretched.pain behind the knee or in the back of the thigh that gets worse with activity.Symptoms typically come on gradually over time and may include: Hamstring tendonitis is an overuse injury where repetitive strain results in inflammation and degeneration of one of the hamstring tendons. They are in their most vulnerable position when the hip is bent and the knee straightens e.g. The hamstrings are particularly prone to injury because they cross to joints, the hip and the knee. The hamstrings are made up of three muscles that run down the back of the thigh from the pelvis to the back of the tibia, just below the knee. Hamstring InjuriesĪnother common cause of swelling behind the knee is a hamstring injury, typically a hamstring strain/tear or hamstring tendonitis. Swelling behind the knee with pain from a popliteal cyst is easily treatable but there is a high risk of recurrence without the proper treatment – find out more about Baker’s Cyst Treatment. If the popliteal cyst behind the knee bursts, the fluid seeps down into the calf and pain typically radiates down towards the ankle. As the knee cyst fills up with more fluid and grows, there will be more obvious swelling behind the knee with pain, particularly when bending the knee as this squashes the popliteal cyst. People with a Popliteal Cyst may notice a small degree of back of knee swelling before getting any knee pain. The knee may feel like it is giving wayĪ Baker’s Cyst forms a palpable pocket of swelling in the popliteal fossa forming a lump behind the knee which typically feels like a small, squashy orange.Swelling behind the knee with pain - typically a defined lump rather than generalized swelling.Gout knee, a type of inflammatory arthritis, can also result in a Popliteal Cyst, as can knee injuries such as a meniscus tear or ligament sprain. The most common cause of swelling behind the knee from a Baker’s Cyst is osteoarthritis, with around half of all knee arthritis sufferers experiencing a Baker’s Cyst at some point. As the swelling builds up, it can form a lump behind the knee, known as a Baker's Cyst. Sometimes, excess fluid seeps backwards out of the joint and collects in the popliteal bursa, causing it to swell. If the knee is damaged or injured, it produces extra fluid in order to protect the joint, provide lubrication and speed up healing. What Causes A Bakers Cyst? The knee joint is surrounded by a fluid filled sac which lubricates the joint and provides the necessary nutrients to keep then joint healthy. The bursa helps to reduce friction between the two muscles allowing smooth, pain-free knee movements. The popliteal bursa sits between the one of the hamstring tendons, semimembranosus, and one of the calf muscles, gastrocnemius. What Is A Baker’s Cyst? A baker’s cyst develops when there is inflammation of the popliteal bursa, a small fluid filled sac found at the back of the knee. Here we look at six common causes of swelling behind the knee, the causes and symptoms of each, how to tell whether your lump behind the knee something serious and the best ways to treat the causes of swelling behind the knee. In most cases, back of knee swelling is caused by a build-up of fluid or an abnormal growth in the popliteal space – the soft area at the back of the knee. There are a number of different causes of swelling behind the knee. If your swelling is more round the side of your knee rather than at the back, check out the Side Knee Swelling article. Most times when the back of the knee is swollen, it can be treated with a combination of rest, regular ice, compression bandages, exercises and physical therapy, but some case may require knee surgery. It might be that only one knee is swollen, or there may be swelling behind both knees. Sometimes there is back of knee swelling and pain, other times there is a lump behind the knee but no pain associated with it. The most common is a Bakers Cyst where there is inflammation of the popliteal bursa at the back of the knee.
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