Cartilage wear in the knee joint is a relatively common pathological change, commonly seen in osteoarthritis of the knee, which is characterized by degenerative changes in the cartilage and the proliferation of bone fragments (commonly called bone spurs) at the edge of the joint, whose main symptoms are pain and dysfunction of the knee joint. Generally speaking, early histological degeneration or damage to cartilage occurs gradually after the age of 20, which is commonly referred to as gradual wear and tear. It is true that cartilage is difficult to repair, but this does not mean that it is incurable. We can reduce or even eliminate pain through maintenance and aggressive treatment. As long as the joint is pain-free and movement is not limited, the goal of treatment will be achieved. How do I take care of my knee joint? First of all, the knee should be kept warm, and women should try not to wear short skirts after the weather turns cool. Secondly, the knee should avoid movements that can cause pain, such as sitting with the knee bent for a long time, squatting and kneeling, going up and down stairs, climbing mountains, etc. Osteoarthritis of the knee joint is a degenerative disease, so it is important to pay attention to maintenance. For conservative treatment, creams can be applied externally, Chinese herbal medicine can be taken internally, oral non-steroidal anti-inflammatory and analgesic drugs, intra-articular injection of sodium vitreous acid, physiotherapy, and other methods, as well as isometric contraction exercises for the quadriceps. Due to the older age of most patients, treatment of osteoporosis may also be required in conjunction. Most cases of knee osteoarthritis are effective with conservative treatment. If aggressive conservative treatment is not effective, surgery may be considered. It is recommended to have another MRI (magnetic resonance imaging) of the lumbar spine to further clarify the diagnosis. Because lumbar disc herniation, lumbar spinal stenosis, lumbar degenerative osteoarthritis, lumbar spondylolisthesis, lumbar tuberculosis, lumbar spine tumor and other diseases may cause lumbar leg pain. Through MRI examination, combined with the patient’s clinical signs, a clear diagnosis can basically be made. Lumbar spine osteophytes are only one of the causes that can cause low back and leg pain. For patients with lumbar spine disease, usually should pay attention to lumbar warmth, avoid wind and cold; sleep on a hard bed, sit on a hard bench, do not sit on a low bench; reduce the action of bending over for a long time; do not sit for a long time; avoid carrying heavy objects, such as to carry things to squat down to get, do not bend over to get; usually do not lean on the bed to read and watch TV; if lumbar pain occurs, tying the lumbar girth is still useful. In daily life, back pain is inevitable. But as long as we usually pay attention and avoid some factors that can cause low back pain, we will reduce the occurrence of low back pain.