Sinus cancer can cause long-term bloody sputum that is not good all the time, but if the patient is in the early stage and after timely treatment, the prognosis is generally better. However, if the patients are in early stage and have timely treatment, the prognosis is generally better. If the patients do not have timely treatment, it will lead to long-term bloody sputum. The cause of sinus cancer is not clear yet, most of the sinus cancers can cause patients to suffer from long-term bloody sputum, but the specific situation depends on the patient’s condition. If the patients of sinus cancer are in early stage and seek for medical treatment in time, the prognosis of most of the patients is relatively good, and generally it will not lead to long-term bloody sputum. If patients with sinus cancer do not receive timely treatment, it may develop into advanced stage, which may lead to the phenomenon of long-term bloody sputum. If patients with sinus cancer are not treated in time, it may lead to long-term bloody sputum which is always bad, patients should consult doctor in time and follow doctor’s instruction for treatment.