Suffocation occurs when a person cannot breathe due to a lack of oxygen or an obstruction in the airway. This can happen in various situations, such as choking on food, drowning in water, or being trapped in a confined space. When the body does not receive enough oxygen, it can lead to unconsciousness or even death if not resolved quickly. Common signs of suffocation include difficulty breathing, gasping for air, and a bluish color around the lips or fingertips. Immediate action is often required to clear the airway or provide oxygen. Techniques like the Heimlich maneuver can help in choking situations, while CPR may be necessary if the person becomes unresponsive.