Without coughing, but with sputum with bright red blood, this manifestation requires consideration of an inflammatory reaction in the respiratory tract. Clinically, it is common to see congestion and edema of the mucosa of the respiratory tract, exudation of inflammatory material, accompanied by rupture and bleeding in the walls of the blood vessels attached to the lymph nodes of the bronchial smooth muscle. It is common to see various causes of bronchiectasis, as well as pharyngitis, idiopathic pulmonary interstitial fibrosis combined with infection, and, less commonly, malignant tumors of the lung, such as bronchial carcinoma and bronchopulmonary carcinoma. Blood test, X-ray or CT of both lungs can be taken, and if necessary, respiratory secretions and biopsies of the occupying lung lesions can be taken for pathological examination to clarify the nature of the cause and provide timely treatment.