Choking is a life-threatening medical emergency which needs quick action for survival.
Choking occurs when an object blocks the airway, making it impossible to breathe. Choking can occur at any stage of life and can be fatal. The oesophagus (food pipe) and trachea (windpipe) share an opening at the back of the throat. When a person swallows food, the food travels down to the stomach via the oesophagus. When a person swallows food, a small flap of cartilage (called the epiglottis) covers the opening of the trachea, so the food goes right into the oesophagus.
Sometimes, as we laugh, talk or run while eating, the epiglottis fails to close the trachea fast enough and food slips down the trachea. Most of the time, our body fixes this problem by coughing up the blockage. But when the food gets lodged way down the trachea, it may block the airflow, thus choking the person.