What is this article about?
Choking occurs when the trachea is completely or partially blocked by a foreign body (food, liquid or another object), obstructing airflow. Choking can be gradual or sudden, and it may only take a few seconds for the airway to become completely blocked. The specific symptoms experienced by a choking person will depend on the foreign body causing the obstruction, as well as the severity of the blockage. If airflow is completely blocked, the brain will be deprived of oxygen. It only takes four minutes without oxygen for brain damage to occur.