Knee pain in the elderly may be caused by meniscus injury, ligament injury, knee inflammation and osteophytes. 1. Meniscus injury: if the elderly suffer from trauma or joint wear and tear, such as damage to the meniscus, it is easy to appear the symptoms of knee pain. 2. Ligament injuries: If the old people suffer from chronic wear and tear of the knee area or suffer from violent impact, which damages the ligaments, it will also lead to knee pain. 3. Knee inflammation: elderly knee pain may also be suffering from knee inflammation, such as osteoarthritis, synovitis, degenerative osteoarthritis, etc. When these inflammatory diseases are in the acute attack period, due to the stimulation of inflammation, it is easy to cause knee pain. 4. Osteomalacia: If there is osteophytes in the elderly, it will change the normal function of the knee and cause compression to the local nerves, thus leading to knee pain. Elderly people with knee pain are advised to go to the regular hospital to improve the relevant examination, to clarify the specific causes, and actively follow the doctor’s instructions to deal with, so as not to delay the condition.