Exhaling bitter almond-flavored gas may be caused by cyanide poisoning, accompanied by nausea and vomiting, convulsions and shock, and other symptoms, and need to go to the hospital in time for emergency treatment. Cyanide is a highly toxic substance that enters the human body through the respiratory and digestive tracts. After this kind of poison is hydrolyzed, it will produce a gas with a bitter almond flavor, thus causing the patient to have a bitter almond flavor when exhaling. Slightly poisoned patients will be accompanied by dizziness and headache, nausea and vomiting, chest tightness, blurred vision and other symptoms; patients with severe poisoning will experience shortness of breath, loss of consciousness, convulsions, shock and other manifestations, and even life-threatening. Patients need to go to the hospital in time, follow the doctor’s instructions, carry out first aid treatment, alleviate the symptoms of poisoning, in order to achieve the purpose of saving lives.