Prevention of Perthes Disease(Legg-Calve) 
Sunlight: Healthcare professionals recommend sun exposure of 15 minutes a day to the hands and face to help the body make vitamin D. Vitamin D helps calcium be absorbed and used by the body. Avoid overexposure to the sun. Use sunscreen on children when exposed to intense sunlight.

Healthy diet: Being underweight is a risk factor for bone loss. Eating a healthy diet and staying within a healthy weight is important.
A high protein diet increases calcium excretion and may increase the calcium needs for the body. Fiber, oxalates (in rhubarb, spinach, beets, celery, greens, berries, nuts, tea, cocoa), and high zinc foods (such as oysters and red meats) decrease absorption, requiring more calcium as a dietary supplement.

Eliminating fall hazards: If a child has bone loss, it is important not only to help prevent further bone loss, but also to prevent a fracture. Eliminating hazards in the house that can increase the risk of falling is important. Wearing sturdy shoes is important. Caretakers should not hesitate to take a child with Legg-Calve-Perthes disease to the doctor is the child is having hip or leg pain after a fall.