First aid: First of all, call an ambulance. In the process of waiting for the ambulance, the following measures need to be taken: let the patient lean forward and pat the patient's back between his shoulders with his palm. If it doesn't work, you need to stand behind the patient, put your fist against the patient's abdomen and back, hold your fist with the other hand, and push it up and down five times to help the patient breathe. Patients can also take such self-help measures: put their abdomen against hard objects, such as kitchen countertops, and then squeeze their abdomen hard to make things stuck in their throats pop out.
Absolutely forbidden: don't feed water or other food to patients who are coughing.
Light the alarm: as long as there is suffocation, you need to call an ambulance to rescue the patient quickly.