Sputum that is red but not blood is commonly manifested in some lung problems, such as lobar pneumonia, which can generally appear as rusty red sputum. Also, it is seen in acute pulmonary edema caused by left heart failure from various causes, which can appear as pink, frothy sputum. In this case, blood tests, CT of both lungs, heart function, lung function, ultrasound of the heart, and ECG can be taken to find the cause and treat the cause. For inflammatory reactions, anti-inflammatory treatment such as penicillin and cephalosporins can be chosen. For heart failure, you should seek timely hospitalization, cardiac and diuretic treatment, and protection of cardiopulmonary function.