Nosebleed with a long strip of thick material is considered to be a clot formed by the accumulation of blood in the nasal cavity after bleeding. Nasal cavity dryness nasal mucous membrane erosion bleeding, cavity mucous membrane capillary fragility, nasal mucous membrane damage can be caused by nosebleeds, blood residue in the nasal cavity can form clots. Nasal tumors can also cause nasal bleeding caused by such a situation, such as nasal hemangioma, ectropion papilloma, nasal sinus malignant tumors and so on. If there is no discomfort after blowing out the nasal mucus and no bleeding, you can observe the bleeding, but you need to avoid exerting yourself and lowering your head for a long time. If there is still bleeding or frequent bleeding after blowing the nose, you need to go to the ear, nose and throat department of the hospital in time for the doctor to check, do nasal endoscopy, if necessary, do sinus ct examination to make a clear diagnosis and then choose the treatment. Nasal mucosa mild erosion and damage can use physiological seawater nasal wash to keep the nasal cavity clean, external use of compound menthol nasal drops to keep the nasal mucosa moist, while oral vitamin C tablets to promote mucosal repair. If the examination is other problems, such as abnormal development of nasal structure, tumors and so on, it is necessary to target treatment. It is recommended to consult a doctor when you find this symptom, and standardize the medication and treatment after a clear diagnosis.