Sudden coma may be a coma caused by heart disease, stroke, drug and food poisoning, heatstroke, drowning, etc. First aid care measures are as follows. 1. If drug poisoning is suspected while waiting for the emergency vehicle, pay attention to whether there are medicine bottles around. If there are drugs, keep the bottles and hand them over to the medical staff when the emergency personnel arrive. 2. If the coma is caused by food poisoning more than anything else, keep the food you have eaten. 3. General coma patients need to have their clothes buckles, belts and other restraints untied and the coma patient’s head tilted to the side, which can keep the airway open. 4. If the coma patient has a backward tongue drop that affects breathing, pull the tongue out. 5. Drowning patients First aid, the drowning patient to shore to save the drowning head down, so that the water does not flow into the airway. If there is no more breathing, artificial respiration is needed. 6, fracture patients fall parts not only painful, and some will be deformed, swelling functional limitations, and even the bones will be exposed, need to stop bleeding in time, too much bleeding will cause cardiac and respiratory arrest. The patient should not be moved before waiting for the arrival of the emergency doctor, and the patient’s shoelaces and clothes should be untied to reveal the fracture site.7. If the chest is fractured, find a clean towel or plastic pad to seal the fracture site.8. If the limbs are fractured, find a clean gauze or towel to wrap the fractured ends, and never pull the patient. 9. Do not eat while waiting for the emergency vehicle or send the patient on the way to the hospital, and do not give the patient painkillers, because it will cover up the symptoms.