Nasal leakage of cerebrospinal fluid is based on brain trauma based on the presence of a defect at the base of the skull, resulting in leakage of cerebrospinal fluid from the nasal cavity. After the patient suffers from trauma, there may be blood and watery fluid coming out of the nasal cavity, and this kind of patient often suffers from heavy trauma, and some of the patients may be accompanied by coma, impaired consciousness, and other typical signs of cerebral contusion injury. Cerebrospinal fluid leakage can cause poor drainage of cerebrospinal fluid and intracranial infection, so cerebrospinal fluid leakage should be observed in bed, and some patients can stop it within a few days without any special treatment, if there is a persistent leakage, it is feasible to repair the treatment.