what causes blood in spatum while suffering from brontichis?

Question: what causes blood in spatum while suffering from brontichis?
- Keywords:
  brontichis,
  spatum
Asked by da celeb to Caroline, Derrick, Mark, Marta, Sammy on 11 Jul 2017.
- Sammy Wambua answered on 11 Jul 2017:
  
  Hi da celeb,
  
  Blood in sputum is usually from the lungs and is often the result of prolonged coughing or a chest infection.
- Caroline Ogwang answered on 12 Jul 2017:
  
  Hi da celeb,
  
  As stated by Sammy bloody sputum is due to a ruptured small blood vessel caused by coughing and/or a bronchial infection. Bronchi are airways in the respiratory tract that conduct air into the lungs.

Question: what causes blood in spatum while suffering from brontichis?