Blood in the nasal mucus is not necessarily a sign of nasal cancer. However, nasopharyngeal cancer may present with epistaxis, i.e., blood in the nasal mucus. There are more benign diseases that may present with blood in the nasal mucus, such as rhinitis, cold and fever, so you cannot judge whether nasopharyngeal cancer exists based on one symptom alone. If you have blood in your nose for a long time, you should pay attention to it, but if you have blood in your nose once or twice in a while, you don’t need to be overly nervous. If there is blood in the nasal mucus, it should be combined with other symptoms to determine whether there is nasal congestion or ear pain. In addition, we also need to pay attention to the neck lymph nodes, supraclavicular lymph node enlargement and other comprehensive judgment.