• Coughing blood (haemoptysis).
  • Accumulation of fluid / pus in the lung cavity (pleural effusion / empyema).
  • Accumulation of air in the lung cavity (pneumothorax).
  • Bronchiectasis.
  • Lung infections due to other bacteria or fungi.
  • Tuberculosis in larynx.
  • Tuberculous enteritis or ischiorectal abscess: Swallowing of heavily infected sputum can cause infection in the intestines.
  • Spread of tubercular infection to other parts of body through blood (blood borne dissemination).
  • Respiratory failure and Right Heart failure are late complications and occur when lungs are extensively damaged by the disease.