After middle age, the tendons and ligaments of the knee joint begin to undergo degenerative changes, the synovial fluid secretion in the joint cavity decreases, the bone surface of the joint rubs together for a long time to form bone wear, and the tissues around the joint are prone to fibrous adhesions due to inflammation, so the elderly often feel stiffness in the knee joint. This is why the elderly often feel stiffness in their knee joints. When they move, they will make a “clicking” sound or frictional sound, and when they are cold or overly active, they will experience pain, swelling, and fluid accumulation in the joint cavity, and in severe cases, they will have deformed joints and become disabled. Specifically, the causes of knee pain in the elderly are as follows: 1. Chronic synovitis: chronic pain and swelling in the knee joint. Synovial effusion and synovial hypertrophy can be seen on examination. 2. Patellar deviation: the knee joint is sore and weak after activity, improves after rest, and is painful when semi-squatting. 3, free body in the knee joint: the patient’s leg is weak or has a feeling of joint jamming, and there is a friction sound under the patella. 4, prepatellar bursitis: there is a history of trauma, causing prepatellar pain, and localized pressure pain on physical examination. 5, osteoarthrosis: joint pain is obvious after sitting or squatting for a long time, when standing up or going up or down stairs, and relieved after rest. 6, pseudogout: more male patients, preferably in the knee joint. Swelling and pain, high skin temperature and limited function during the attack. 7, femoral head necrosis: hip lesions with knee pain symptoms Pain in different parts of the knee joint often suggests different disorders: 1, the outer iliotibial band of the knee pain. 2, pain around the knee before the knee, also called patellofemoral joint pain. 3. Pain above the knee, which may be quadriceps tendonitis. 4. Pain above the kneecap or on the medial side of the upper tibia, which may be bursitis. Daily care of the knee joint: 1, do not walk too long, when the knee feels uncomfortable should immediately rest. 2, do not do heavy exercise, such as running, high jump, long jump. 3, avoid half squat, full squat or kneeling position. Such as squatting horse stance. 4, do not do the knee joint half flexion rotation action, to prevent half plate injury. 5, maintain the ideal weight to reduce the burden on the knee. 6, pay attention to the warmth of the knee, you can wear long pants, knee pads to protect the knee. 7, less heavy lifting, less wearing high heels. 8.Avoid trauma and overwork. 9, the choice of shoes is very important. A pair of shoes that fit can not only make you walk comfortably, but also reduce the impact and pressure on the knee during exercise. (1) the instep part of the foot can be closely combined with the shoe, width, length are appropriate, can correctly maintain the arches of the foot. (2) the weight of the shoe to light, the sole should not be too soft, and to a little thickness. (3) The heel of the shoe can be about 2-3 cm high, the sole is too flat is easy to walk when fatigue. (4) Shoes with non-slip patterns on the sole. To relieve knee pain, the treatment recipe for acupressure points: Acute sprains seek Liangqiu, joint effusion calf nose seek, cold knees find Kunlun, knee pain in the islet should always be rubbed, plus the bile meridian knee Yangguan, hand three miles at the disease does not stay, kneeling knees to draw blood down the method, knee disease elbow treatment to relieve worries. Should I exercise when my knee is injured? In the case of knee injury, unreasonable exercise will lead to secondary injury to the knee, and over time, the meniscus of the knee will lose its protective and cushioning effect due to wear and tear, and in severe cases, it may be inconvenient to walk. The knee joint is a hinge joint and can only move back and forth, not left and right. If the knee joint is already injured, the first thing to do is to pay attention to protection. Simple back and forth exercises can be performed if allowed to promote blood circulation in the knee joint, but it is not suitable for strong activities, not enough movement will easily cause stiffness of the knee joint, excessive movement will accelerate the wear and tear of the joint, but the movement is still to the extent that the joint does not feel pain. Through the appropriate muscle strength, stability training can play a preventive health role for the knee joint. 1, side lying exercises: lying on the left side, knees slightly bent, heels together. Head resting on the left arm, eyes looking straight ahead. The right hand holds about 1 to 2 kg of weights, placed on the outside of the leg. Then tense the abdomen, tense the hips, lift the knee of the right leg as high as possible, hold the body still while lifting the leg, hold for a few seconds and put it down. Repeat the exercise 15 times, change legs. 2, leg lifting exercises: stand behind a solid bench or step, step on the right foot (heel do not hang), and focus the weight on the right foot, the body is raised, the left foot toes touch the step, hold on for 1 to 5 seconds. Then lower the left foot and tap the ground. Repeat 8 to 10 times, change legs. 3, bridge exercise: lie flat on the ground, knees bent, feet apart, hip-width apart, arms on the sides. Slowly lift the hips and leave the ground smoothly. Then slowly put down. Repeat 15 times. 4, leg extension exercise: lie flat, knees bent, feet flat on the ground. Extend the left leg, set into the stretching band or towel, hands grasp the ends of the band. Use the strap to pull the leg to the chest, and then force the calf straight, hold for 10 to 30 seconds to exercise the calf muscles and hamstrings. Repeat the movement 3 to 5 times, then switch legs.