Causes of blood in sputum are - Amyloidosis ,Deep Vein Thrombosis (DVT) ,Lung Cancer ,Pneumonia ,Tuberculosis
,Wegener's Granulomatosis , Acute or chronic bronchitis
Bleeding disorder including anticoagulant therapy ,Bronchial adenoma ,Bronchiectasis and many others . Please
consult an ENT surgeon and Chest physician for the diagnosis for treatment . Hope this helps you . Take care
and regards !