8When to Visit a Doctor
If you cough up a large amount of blood (more than one teaspoon), make sure to seek emergency care. Otherwise, it may lead to airway obstruction or the filtration of blood into the lungs. Even when the amount is small, it is still better to inform your healthcare provider. This may indicate an underlying health condition. Below are some warning signs to know:
– Cough up blood after a chest injury or a fall
– Cough up too much blood
– Bloody stool or urine
– Other signs like shortness of breath, lightheadedness, fever, dizziness, and chest pain [10]
