Near-drowning is respiratory impairment from being in or under a liquid. Normal air exchange is prevented by inhaled liquid when a person’s nose and mouth are under the surface of a liquid or when a person’s face comes in contact with liquid.

Near-drowning is caused by liquid, most commonly water, filling the lungs resulting in breathing problems. At first, the person will hold their breath. Eventually, the person will no longer be able to hold it. The liquid will then flow into the lungs. This liquid will not allow the normal gas exchange in the lungs to happen.