Sometimes when we swallow in a hurry, swallowing large, hard, or cold food, there will be an obvious choking pain behind the sternum. When swallowing food and water to the oral cavity and pharynx, the nerve endings can be sensed and stimulated to send signals to the center, which then sends out the motor action to complete the rhythmic swallowing action from the isthmus to the esophagus. If the swallowing is very urgent, or if the food is badly stimulated, relatively large, hard or cold, it will trigger the retrograde peristalsis of the esophagus and cause obvious gagging and painful, suffocating sensations. So when swallowing, you can’t rush, and you can’t swallow very big mouth, very hard and other stimuli, it will easily trigger the symptoms of choking.