If an infant chokes on a drink of water in the trachea or lungs, the early stage is usually characterized by coughing. This is because if there is a foreign body in the trachea, the body will have some stress response and cough violently to expel the foreign body outside the trachea. But generally infants have a weak cough reflex, which can easily lead to water accumulation in the trachea and lungs, resulting in some airway obstruction performance, choking to a large amount of water, there will be breathing difficulties, serious lips or face, or even the whole body cyanosis, and serious will also appear hypoxic central coma, need to be immediately sent to the hospital for emergency treatment. If it is choked to the later stages, the water will usually form inflammation in the trachea or lungs, resulting in the performance of pneumonia, coughing, coughing, fever and other symptoms.