The spinal cord cavity is mostly caused by the subungual herniation of the cerebellum (Chiari), which leads to the expansion of the central canal of the spinal cord due to excessive pressure, and the injury to the spinal cord leads to neurological paralysis, which is mostly manifested as: motor, sensory perceptual pain and temperature loss below the plane of the injured spinal cord and other limb dysfunction. If the condition is secondary, surgical shunt decompression can be used to prevent secondary damage to the spinal cord, followed by medication to restore nerve function. If spinal cord cavitation occurs, early drug treatment can control the condition and achieve recovery. In addition to neurotrophic drugs, Chinese herbal medicine can be used to enhance the local blood circulation of the injured nerve to prevent secondary spinal cord re-injury, and nerve regeneration drugs can be used to stimulate and activate the nerve cells that are paralyzed and shocked to innervate various functions, and other compound treatments can be used to improve recovery. Treatment of early secondary spinal cord cavitation For patients with submicrocephalic tonsillar herniation combined with spinal cord cavitation, the diagnosis is usually confirmed by MRI, and surgical decompression is usually required. Subhypophyseal herniation is a congenital developmental abnormality in which the cerebellar tonsils extend downward, or protrude through the foramen magnum into the cervical spinal canal with the lower medulla or even the IV ventricle, due to an abnormal development of the brain structures in the posterior cranial recess during the embryonic period. In the presence of a spinal cord cavity, sensory dissociation may occur, but tactile sensation is still present, while skin peeling and ulceration may occur due to the loss of neurotrophic effects on the skin. Surgical treatment is the main means to relieve the compression of the cerebellum, brainstem, spinal cord, fourth ventricle and other neural tissues by the foramen magnum and cervical spine, to unblock the cerebrospinal fluid circulation, and to relieve the symptoms of neurological compression and hydrocephalus. In a small number of patients with severe subcerebellar tonsillar herniation, removal of the cerebellar tonsils can be considered; in cases with evidence of adhesions to the median foramen of the IV ventricle, microdissection can be performed; in cases with hydrocephalus, shunts can be performed as appropriate.