Knee is composed of femur, tibia, fibula and patella, which is the most in human joints. Bone metabolism needs a lot of calcium ions, which are mainly provided by food. As the old saying goes, it makes sense to make up for what you eat. Recommended food: milk, bone soup, soybean milk, cheese, fish and shrimp, egg yolk, peanut kernel, kelp, laver, fungus, etc. It is suggested to change the mode to ensure a balanced nutrition.

2. Foods with high gum content

There are many complicated ligaments in the knee, and it is also important to maintain strength, so eat foods with high gum content. Recommended food: beef tendon, pig's trotters, pig's ears, fish skin, chicken feet, etc.

3. Foods that affect calcium absorption

Mainly oxalic acid foods: spinach, coriander, figs, etc. Foods containing more phosphoric acid: carbonated drinks, coffee, cola, etc. Fatty acid food: animal oil, especially lard and fat. The above foods can affect the absorption of calcium ions in the body and can consciously reduce the intake.

Thirdly, we must control the intake of energy in diet to avoid the heavy load on the knee joint caused by obesity.

4, develop the habit of daily physical activity, moderate exercise is good for bones and joints, can help the absorption of calcium, but don't overdo it, it will be counterproductive and damage the knee joint.

It's better for the elderly to exercise in the passage, and do less mountaineering and stairs. Do more leg lifts, knees bends and knees presses. You can also practice yoga to increase the flexibility of your bones.

6. Although arthritis is not frozen out, once the joints are attacked by cold air, it will aggravate discomfort and pain. So keep your knees warm.

Once the knee joint is swollen, watery and painful, you need to see a doctor, take pictures and take medicine.