Babies who choke while drinking milk usually present with an irritating cough that cannot be relieved by patting their backs or drinking water, and in severe cases may also present with respiratory obstruction and difficulty breathing. In this case, the Heimlich maneuver can be applied, which is a specialized treatment for acute respiratory obstruction. In the case of an infant, hold the child’s chest with one hand and make the child lie prone, paying attention to the fact that the head must be lower than the chest and abdomen, then pat the child’s back with the root of the palm of the other hand, so that the thorax will contract, thus giving the airway outward impact pressure and making the milk blocked in the airway spit out of the mouth. If there is no irritating cough and no respiratory distress, the symptoms are relieved. If there is still a paroxysmal cough, or if the lips are blue and the breathing is rapid, you need to go to the pediatric department of the hospital promptly to check whether aspiration pneumonia has occurred.