Do not cough but sputum with blood a year may be related to bleeding gums, rhinitis, chronic lung diseases, malignant tumors and so on. 1. Gum bleeding, mostly chronic, and self-conscious symptoms are not obvious, and will not appear cough symptoms, blood with sputum discharge is manifested as blood in sputum. 2. Rhinitis, which can lead to bleeding in the nose and blood pouring into the mouth through the nasal cavity, can also appear as blood in sputum. 3. Chronic lung diseases, such as chronic bronchitis, chronic obstructive pulmonary disease, etc., can damage the bronchial mucosa and cause bleeding. 4. Malignant tumors, which are typical diseases that can cause blood in sputum, can also cause a significant increase in sputum secretion. Do not cough but sputum with blood there may be other reasons, such as coagulation dysfunction, drug side effects and other factors, it is recommended that patients seek medical attention in a timely manner, under the guidance of the doctor to check the cause of the disease, and at the same time to take targeted treatment.