Early MRI of femoral head necrosis is obvious. The specificity and sensitivity of MRI for the diagnosis of this disease are above 99%, which is the gold standard for the diagnosis of this disease. Traumatic or non-traumatic femoral head necrosis has abnormal manifestations in early MRI, and the diagnosis of femoral head necrosis can be confirmed when the T1-weighted image (T1WI) of MRI shows banded low signals or the T2-weighted image (T2WI) shows a double line sign. Necrosis of the femoral head is caused by trauma, long-term use of hormones, and ethanol poisoning. Hip and thigh pain, claudication, and lower limb shortening deformity may occur. If you feel unwell, you should go to regular hospitals in time, do relevant examinations, clarify the cause of the disease, and then follow the doctor’s instructions for treatment to avoid delaying the condition.