Auntie Jin, 60 years old, has been retired for many years. She has a rich and colorful life after retirement and often travels, especially likes to climb mountains. Recently, she experienced pain in both knees when walking, and the pain was obvious when walking up and down stairs, and also when walking on a flat road, and she always felt cold in the knee joints, as if a cold wind had entered the joints, and the joints gradually became inflexible. When moving her knee joint, she could hear a clicking sound. Since the joint pain, Auntie Jin’s range of motion has been greatly reduced, and she has to walk to the grocery store to buy food, which is very hard. This made Auntie Jin very distressed. When she went to the hospital to see the pain department, the doctor examined her and found that she had pressure points around her knee joint, swelling in the joint, and a ringing sound when she moved. The doctor suggested to check the x-ray of the knee joint. The result was osteoarthritis of the knee joint. The doctor informed Auntie Jin that osteoarthritis of the knee is a degenerative arthritis, a chronic, deforming joint disease after middle age, involving mostly weight-bearing joints, characterized clinically by joint pain, swelling, deformity and limited activity. It is characterized by pain, swelling, deformity and limitation of movement. It is caused by degenerative changes in joint cartilage due to repeated wear and tear movements over a long period of time. The treatment mainly focuses on relieving pain and swelling, protecting joint function, delaying disease development, correcting deformity and restoring joint function. According to Auntie Jin’s condition, the doctor recommends more rest, less walking, no weight-bearing, less going up and down stairs, keeping the joints warm, and not doing movements that cause joint pain. In terms of medication, she was given oral medication to protect the joint cartilage and intra-articular injections of sodium vitrate to lubricate the joints. After treatment, Auntie Jin’s joint pain improved significantly, and the pain when walking up and down stairs disappeared, and Auntie Jin was able to go out again. However, in order to protect her joints, she followed the doctor’s advice and stopped climbing mountains. Doctor’s advice: elderly people with joint pain, to seek medical advice in a timely manner, can not exercise with pain, so as not to aggravate the damage to the joints; daily life, to avoid harmful joint movements, such as mountain climbing, stair climbing exercise, avoid running squatting and jumping movements; to protect the joints, avoid weight, avoid long distance and long walking, when necessary, the use of crutches, walkers to assist in activities or walking, etc.; pay attention to joint warmth and so on.