What is the medical term for spitting up blood?

The correct term for spitting up blood is hemoptysis. This term specifically refers to the act of coughing up blood that originates from the respiratory tract, such as the lungs or bronchi. It is an important medical sign that can indicate various conditions, including infections, lung diseases, or other serious health issues.

In contrast, hematemesis refers to vomiting blood, which originates from the gastrointestinal tract, and is not related to spitting up blood from the respiratory system. Asphyxia relates to a lack of oxygen or difficulty breathing, while apnea means a temporary cessation of breathing. These terms address different medical concerns and conditions, reinforcing why hemoptysis is the appropriate term for spitting up blood.