It is usually not present in cerebrospinal fluid rhinorrhea, but is usually seen in trauma, and is easily confused with traumatic rhinorrhea or tumor erosion, so it must be promptly identified. In terms of its symptoms, cerebrospinal fluid nasal leakage after injury is usually a case of nasal blood oozing, usually bright red or dark red, the amount is usually not particularly large, and occasionally the amount is particularly large, it must be treated promptly with relevant nasal endoscopy, and may require craniotomy. The initial amount may be very much, a day can appear 300 to 400 ml, and then with the gradual extension of time, the wound may heal, that will slowly become less, to the late will only exist in the head and bending when the bleeding fluid, and later if there is no infection symptoms, basically are mainly clear bright color, some patients will also appear in the back of the nasal cavity and the feeling of water in the throat. This sometimes should also be alerted to the occurrence of nasal leakage. In some cases, other symptoms may occur, such as headache, dizziness, nausea and vomiting, and in some cases, fever, headache, chills and even impaired consciousness, if the infection is followed by cerebrospinal fluid rhinorrhea. Therefore, it is also necessary to identify other changes in the condition in a timely manner.