The stomach is meant to keep these acids from moving back up through the esophagus and causing irritation however, these processes are not always perfect. The digestive tract is designed to be able to withstand these substances however, the airway and esophagus are not accustomed. The digestive tract is composed of acids and enzymes for digesting food. Specific conditions that can lead to gagging are described below, including those are gastrointestinal, infection-related, environmental, and mechanical. Oxygen is temporarily blocked from coming into the body, and in turn, the diaphragm contracts as a means of allowing the lungs to expand and let in oxygen, even though there is none actually coming in. These irritants cause the airway to close-off as a means of protecting the body from potentially dangerous elements. Gagging can be caused by any irritant that enters the airway and aggravates the lungs and bronchial tree. It connects to the lower respiratory system that includes the trachea, lungs, and segments (bronchial tree) that bring oxygen to these areas. The proximal airway (or upper respiratory system) is composed of the nose, mouth, and throat. It is important to follow-up on your symptoms with your physician in order to get appropriate an diagnosis and care. Symptoms that can be associated with gagging may include: Gagging is often a normal defense mechanism your body uses to protect itself from potentially dangerous substances however, sometimes gagging can signal a more serious underlying problem. These conditions are reflexes triggered when your airway closes while your diaphragm contracts. Some people also associate 'gagging' with dry heaving or retching, which is the sensation or feeling of vomiting without getting rid of any stomach contents.

The definition of 'gag' or 'gagging' is to suffer a throat spasm that makes swallowing or breathing difficult.

Throat gag hd