The first step is to determine if the hemoptysis is hemoptysis. Hemoptysis (or coughing up blood) is defined as bleeding from the larynx and any part of the respiratory tract or lung tissue below the larynx that is coughed up through the mouth. To determine if it is hemoptysis, we must first exclude nasal and oral bleeding and vomiting blood. Blood from the anterior nasal cavity usually flows out from the nostrils, which is easier to determine; blood from the posterior nasal cavity flows to the throat and is then coughed out through the mouth, which can easily be mistaken for hemoptysis, so the patient should be asked to open his mouth and make the “ah” sound, and if he sees blood flowing from the back wall of the throat from above downward, he can determine that it is posterior nasal bleeding. Oral bleeding is mostly spit out directly or after sucking, and the blood is often mixed with saliva, so careful examination of the oral cavity can easily reveal the bleeding foci. Vomiting blood can have a history of upper gastrointestinal ulcer, cirrhosis of the liver, etc., mostly accompanied by epigastric discomfort, nausea, vomiting and other symptoms, blood mixed with food residues or gastric juice, thicker, no sputum or sputum with blood. In contrast, hemoptysis may have a history of tuberculosis, bronchial dilatation, pneumonia, mitral stenosis, etc., and is mostly accompanied by symptoms such as throat itching, cough, chest tightness, etc. The blood is mixed with sputum, which may become foamy, and there is mostly blood in the sputum. It is important to maintain emotional stability and a quiet environment when hemoptysis occurs. Some people desperately hold their breath for fear of coughing up blood, which is very likely to cause asphyxia (blood blocking the trachea, unable to breathe). During hemoptysis, lie flat on your back with your head tilted to the side to keep quiet. This will slow down the heart rate and lower the blood pressure, making it easier to stop the bleeding. If available, take some hemostatic drugs (e.g., Anilox, 6-aminocaproic acid, etc.). If the cough is severe and the hemoptysis is still small, general cough suppressants can be taken, as a severe cough is not conducive to hemostasis. However, it should be noted that if the amount of hemoptysis is large, central cough suppressants (e.g. codeine) should not be used, as they may inhibit the coughing reflex, which is not conducive to timely coughing up of blood and cause asphyxia. If hemoptysis suddenly stops, and chest tightness, irritability, cold sweat, or even purple face appear, it indicates hemoptysis and asphyxia, the upper body of the patient should be immediately inverted along the edge of the bed or the patient should be picked up with the head down and the feet up, and the back should be gently patted, while the patient’s mouth should be pried open (remove the dentures) and the blood clots in the mouth and throat should be pulled out, so that the blood in the trachea can flow to the mouth under the influence of gravity, reducing the blockage and making some The patient’s asphyxia can be relieved. In addition, the patient should be sent to the hospital in time for treatment.