1. Avoid overusing the affected extremity:

1. Maintain correct posture
2. If necessary, you can use a crutch, cane and support, etc. to reduce the burden of your lower limbs
3. You can wear expandable nylon protector and warm cloths at night to alleviate the pain and stiffness of the affected extremity
4. Do not join too many activities

2. Control the pain:
You can use hot compress, hot water soaking and tub bathing in normal time. If it does not work, you should come to hospital.

3. Protect the joint from injury or over bearing body weight:

1. Lose weight to reduce the burden of the joint
2. Overloading exercises, such as lifting weights, carry heavy things, getting things on a high place, etc.
3. When your knee(s) degenerate, you should avoid climbing mountains, walking long distance, etc.