Knee straightening pain may be due to meniscus injury, ligament strain, osteoarthritis, popliteal cyst and other factors.
1. Meniscus injury: strenuous exercise or violent impact can lead to meniscus injury, for the symptoms of mild injury, usually walking may not be obvious, when the knee straightening or twisting and other actions, there will be obvious pain symptoms.
2. Ligament strain: improper exercise or trauma can lead to ligament strain in the knee area, when the injury is mild, the pain is relatively mild, when the force activity or straighten the force, there can be obvious pain symptoms.
3. Osteoarthritis: this is a chronic disease with joint cartilage damage, early symptoms are not obvious, with the development of the disease will be accumulated to the whole joint tissue, joint pain symptoms are mainly mild or moderate intermittent hidden pain, especially after the activities of pain aggravation.
4. Popliteal cyst: it is a collective term for the enlargement of the deep bursa in the popliteal fossa or the swelling of the synovial bursa of the knee joint to the back, which can cause pain and swelling in the back of the knee, and the elastic soft tissue mass can be palpated, and when the knee is straightened up and exerted, the cyst can be painful when it is compressed.
If the pain is not relieved after resting, or accompanied by other abnormal symptoms, the patient should consult a doctor as soon as possible to clarify the cause of the disease and then carry out standardized treatment.