For young people, blood in sputum may be caused by lung diseases such as bronchitis, pneumonia, bronchiectasis and tuberculosis. But if people over 40 years old have blood in their sputum, they should be alert to the occurrence of lung cancer. You should go to the hospital in time for X-ray chest examination and sputum exfoliation cytology examination. These two methods are simple, economical, less painful and have high positive rate.

Bloody sputum (with bloodshot and blood clots in sputum) can have the following conditions:

First, there is bright red blood in sputum, which is more common in tuberculosis or bronchiectasis, and sometimes this phenomenon can also occur when there is inflammation in the pharynx.

Second, black blood and phlegm are more common in lung infarction.

Third, hemoptysis foam-like sputum can be seen in pulmonary edema.

Fourth, long-term sputum with blood or accompanied by chest pain, fatigue, emaciation, we should be alert to bronchial lung cancer.

General lung X-rays can be used for preliminary diagnosis or exclusion.