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How to treat avascular necrosis
Rest.
Decreasing the amount of stress and weight on the affected bones will result in a huge amount of pain relief, slow the damage rate, and give your body a chance to heal. Apart from physical therapy, make efforts to minimize your daily physical activity movement as much as possible.
You may need the aid of crutches or a walker if the affected joint is your hip, knee or ankle. Consider crutches an invitation to stay off your legs.