Stopping breathing can be caused by any of the following reasons: • obstruction of the respiratory tract (suffocation); • illness (for example, pneumonia); • respiratory condition (emphysema or, for example, an asthma attack); • electric shock; • shock; •drowning; • myocardial infarction or heart disease vaniyam; • head, chest or lung injury; • severe allergic reactions to food or insect bites; • drugs or alcohol; • poisoning (for example, due to inhalation or ingestion of toxic substances).