Does tuberculosis cause coughing up blood?

Tuberculosis is an infection caused by bacteria that can involve the lungs. In pulmonary tuberculosis, inflammation can irritate or damage small blood vessels in the airways, allowing blood to mix with mucus and appear during a cough. The blood may look like streaks in phlegm or may be more noticeable. Its appearance alone cannot confirm tuberculosis.

Coughing up blood can also occur with other lung or airway problems, so a clinician will consider your complete history, examination, and possible exposure to tuberculosis. Assessment may include a chest examination and tests on sputum or other samples, along with chest imaging when appropriate.

Arrange prompt medical advice if you cough up blood, even if the amount seems small or the episode stops. Tell the clinician how much blood you saw, whether it was mixed with mucus, how often it has happened, and whether you have a cough, fever, night sweats, weight loss, chest pain, or breathlessness.

If tuberculosis is suspected, follow the testing and infection-control advice you receive. Do not start, stop, or share antibiotics without medical guidance; tuberculosis treatment uses a planned combination of medicines and requires follow-up.

Seek emergency care now if you are coughing up a large or increasing amount of blood, have trouble breathing, feel faint or confused, develop severe chest pain, or cannot keep your airway clear. These signs can indicate significant bleeding or another serious problem.

Urgent assessment is also appropriate when coughing up blood occurs with a high fever, marked weakness, or a rapidly worsening cough. Keep any appointment even if the bleeding has stopped, because the underlying cause still needs to be identified.

You could ask: What tests will distinguish tuberculosis from other causes of coughing up blood? Do I need to limit close contact while testing is arranged? Which symptoms should prompt emergency help? If tuberculosis is diagnosed, how will treatment and follow-up be monitored?