Blood clots in the nose are mainly seen in the following cases: 1. Patients with secondary rhinorrhea. Such patients may have arterial bleeding inside the nasal cavity and retain a large amount of blood clots in the nasal cavity after bleeding. In this case, the patient is advised to go to an ENT clinic, where the doctor first uses an aspirator to suck the blood clot clean and then looks for the bleeding point under the nasal endoscope, which needs to be treated with coagulation to stop the bleeding, otherwise a large amount of blood clot will be formed when the nasal cavity bleeds again; 2. The patient is post-operative for sinusitis. Patients who are post-sinusitis may have blood clots in the nasal cavity, in this case, nasal flushing treatment can be performed first. After the blood clot is softened, the doctor can gradually suck the blood clot clean with a suction device under the endoscope. In conclusion, patients with blood clots in the nasal cavity should be told not to blow their nose as hard as possible to avoid further bleeding.