Coughing with blood in the sputum is a condition that usually occurs in patients who do not have chronic illnesses, mostly due to the lack of timely clearance of lung heat after a cold, and also due to the lack of timely hydration during external sensations. If there is phlegm coming out of the cough, do not cough with excessive force. If you feel that the phlegm is not coming out well, and you cough harder, the phlegm will be very sticky and it will not come out easily. You should use some phlegm medicine or hydrate, if you do the treatment of lung heat, it can also have a very good effect of phlegm and ventilation, to help phlegm come out better. Don’t cough by yourself, and don’t cough at all, as this will easily break the airway mucosa or the mucosa of the pharynx. Patients with previous chronic lung disease should pay attention to their condition, that is, the original lesions may be unstable, especially bronchiectasis, tuberculosis and tumor lesions of the lung, which are often prone to bleeding. If these chronic lung diseases exist, regular screening is needed to exclude malignant and infectious lesions.