The early manifestations of asthma are not very typical and can be easily misdiagnosed or missed. Parents should pay close attention to the characteristics of asthma and deal with it accordingly to avoid missing the best treatment period. Early manifestations of asthma often include dry cough, wheezing, increased breathing, irritability, and respiratory distress with prolonged expiration, in addition to attention to whether the cough is repeated, especially in the morning or after activity. Because most asthma is triggered by a respiratory infection, the prodromal cough is similar to that of a cold and may be accompanied by a runny nose, sneezing, coughing, etc., profuse sweating or expiratory moaning. Initially, most of the symptoms are not accompanied by fever, and are easily ignored or treated incorrectly, leading to aggravation of the disease. As the condition further worsens, open-mouth breathing, nasal flapping, cyanosis, accelerated breathing frequency, dyspnea, and red ears may appear. Children with allergic rhinitis may also have itchy nose, sneezing, dry cough, wheezing, etc. Children with allergy-related problems may also have symptoms outside the respiratory tract, such as swelling of the lips and face, vomiting, abdominal pain, and hives. Children with severe asthma may present with signs of heart failure, such as jugular venous irritation, swelling, thick and low-pitched wheezing, often accompanied by blistering sounds, or signs of emphysema, such as a barrel chest, may be seen. Asthma in children is a serious respiratory disease and if left untreated, the number of attacks will increase with age. Infant asthma should be diagnosed as early as possible and receive regular and reasonable treatment.