Diet to prevent osteonecrosis of the femur can eat light foods, such as fruits and vegetables, and eat more calcium-containing foods, such as milk, eggs and lean meat, which can increase the density of bone and prevent osteonecrosis of the femur. At the same time, usually do not eat hormones, while avoiding alcohol and smoking, not eating spicy and stimulating food, not eating greasy, such as beef, mutton, seafood. In addition to diet and medication, you can also do outdoor exercise, but avoid doing activities with excessive weight, especially hiking or climbing stairs, swimming, cycling and jogging, and avoid hip injury. These measures can prevent osteonecrosis of the femoral head. If there is pain in the hip without obvious reasons, you need to go to the hospital for an MRI of the hip joint to screen whether it is early osteonecrosis of the femoral head.