Chronic blood crust in the nose is not necessarily cancer. Having blood crust in the nose for a long time may also be a symptom of dry rhinitis, which is directly related to climate, environment and dietary habits. There are many causes of chronic blood crust in the nose, such as colds, rhinitis, nasal polyps, nasal septal disease, etc. Among them, dry rhinitis is very likely and can also cause headache, dizziness, nasal congestion, sore throat, olfactory failure, memory loss and other symptoms. Blood crusts are not easy to blow out when they appear, and a small amount of nasal bleeding can occur when the dried crusts are picked out by force. Patients with nasopharyngeal cancer may also have blood crusts or even nasal bleeding, especially if the lesion is located in the posterior wall of nasopharynx. Patients can go to the ENT department of the hospital for examination, clear diagnosis and symptomatic treatment. Avoid spicy food, tobacco and alcohol to avoid fire, and prevent the occurrence of cold to slow down the stimulation of the nose. It is better to wear a mask when going out to avoid dust and smoke stimulation.