Educational use only: Symptom.Today is an educational tool and does not provide medical advice, diagnosis, or treatment. Results are not a substitute for professional medical care. If symptoms are severe, worsening, or concerning, seek medical attention immediately. In an emergency, call your local emergency number.
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Coughing up blood
Explore what coughing up blood could mean — from the most common explanations to dangerous causes you should never ignore.
MOST LIKELY
No common matches.
MUST NOT MISS
When to seek urgent help
Seek urgent care if coughing up blood is sudden and severe, accompanied by fever, neurological changes, breathing difficulty, or rapidly worsens.
FAQ
What causes coughing up blood?
Coughing up blood can have many causes — see the matching conditions above.
Is coughing up blood dangerous?
Most cases are benign, but seek care if it is severe, persistent, or paired with red-flag features.
What should I do next?
Try the analyzer to add severity, duration, and other symptoms for a sharper match. Always confirm with a clinician.