What causes knee joint extension?

There may be a variety of reasons for knee extension, such as muscle tension or spasticity, joint disease, ligament damage, meniscus problems, nervous system problems.1. Muscle tension or spasticity Muscle tension or spasticity around the knee joint may lead to limited knee extension. This may be caused by maintaining a certain posture for a long time, overusing muscles, lack of exercise, or muscle imbalance. 2. Joint diseases such as arthritis, synovitis, patellar arthropathy and other joint diseases may lead to articular cartilage damage, inflammation and pain, thus affecting the straightening of the knee joint 3. Ligament damage The ligament of the knee joint.(such as anterior cruciate ligament, posterior cruciate ligament, etc.) Injury may lead to knee instability and affect straightening. 4. Meniscus problem Meniscus is a cartilage structure in the knee joint. Meniscus injury or tear may cause knee pain and difficulty in straightening. 5. Nervous system problems Nerve damage or disease, such as sciatica, lumbar disc herniation, etc., may affect the innervation of the knee joint, resulting in limited extension. To determine the specific cause of knee extension, a detailed physical examination, medical history and possible imaging are required.

(e.g. X-ray, MRI, etc.). Treatment will depend on the cause and may include physical therapy, rehabilitation, medication, surgery, etc. It is important to seek professional medical advice when dealing with knee extension problems. A doctor can conduct a comprehensive evaluation and develop a personalized treatment plan to help restore normal knee function. Proper exercise, balanced diet and good lifestyle are also important for joint health.