Knee flexion and extension pain may be caused by physiological factors such as keeping a posture for a long time or too much exercise, or it may be caused by pathological factors such as ligament strain, meniscus injury, osteoarthritis, and so on.
1. Physiological factors: if you keep a position for a long time, such as standing for a long time and sitting for a long time, resulting in muscle tension or spasm of the lower limbs, and pain can occur when you change the position or extend or flex the knee, or too much exercise, the accumulation of lactic acid in the body, there will also be pain in flexion and extension of the knee, which can be relieved after sufficient rest.
2. Ligament strain: when the patient suddenly bounces, runs and other sports, it can lead to ligament strain, resulting in pain when the patient’s knee flexes and extends, accompanied by localized pressure and pain, swelling and joint movement restriction.
3. Meniscus injury: trauma or prolonged weight bearing can lead to meniscus injury, which can lead to pain when the knee joint moves, and in serious cases, it can be accompanied by activity limitation.
4. Osteoarthritis: Trauma and chronic strain and other factors can lead to degenerative disease of the knee joint, causing osteoarthritis, with symptoms of knee flexion and extension pain, and in severe cases, with joint swelling, deformity, and restricted movement.
Knee flexion and extension pain can have a variety of reasons, it is recommended to go to the hospital in a timely manner to improve the CT of the knee joint and other examinations, a clear diagnosis and then carry out the appropriate treatment.