Perforation treatment for femoral head necrosis is a kind of surgical treatment, which does not belong to conservative treatment. Necrosis of the femoral head is caused by various reasons such as impaired blood supply to the femoral head, cell death of bone tissue, necrosis of bone trabeculae and bone marrow, etc. The treatment is divided into conservative treatment and surgical treatment, which is mainly aimed at improving the blood supply to the femoral head and preventing osteoarthritis. Conservative treatment generally refers to medication, preventive treatment in daily life and rehabilitation exercises, and is generally used for mild symptoms and insignificant or minor lesions on X-ray. Surgical treatments include: drilling and decompression, bone flap transplantation with vascularized tip, artificial femoral head replacement, etc. Therefore, drilling and decompression is a type of surgical treatment and is not a conservative treatment. Drilling and decompression can help the pressure within the femoral head and help improve blood flow. However, as the degree of relief varies from patient to patient after drilling decompression, patients are advised to go to the hospital regularly for review and take other treatments if necessary.