The severity of a fracture of the sacral 5 vertebrae is usually determined by the severity of displacement, damage or compression of the cauda equina, and the appearance of corresponding neurological symptoms. If the fracture of sacral 5 vertebrae is very obvious, and the displacement of the fracture is very serious, and the compression or damage to the cauda equina nerve leads to the symptoms of paralysis of both lower limbs, such as loss of muscle strength and sensation, or even incontinence, this is a very serious situation. If the treatment is not timely or the nerve damage is serious, it may lead to serious sequelae such as decrease in muscle power or loss of sensation or sensory impairment of the lower limbs in the future. If the displacement of the fracture is not very obvious or crack fracture, without affecting the nerve is generally not serious, bed rest for 4-6 weeks basically can achieve clinical healing.