Childhood asthma is one of the most common respiratory diseases that seriously affects the physical and mental health of children. In recent years, the prevalence and mortality rate of childhood asthma have been on the rise, and the national survey on the prevalence of asthma among children aged 0-14 was 0.91% in 1990, which has risen to 1.5% in 2000, a figure that means there are more than 10 million children with asthma in China. Asthma has an obvious genetic predisposition, and if a child has relatives with allergic diseases such as asthma, allergic rhinitis and allergic dermatitis, the probability of having asthma is higher than that of the average child. In addition, allergic children will have a higher probability of developing asthma than the average child. Your baby should be considered allergic if he or she: coughs, runs and sneezes as soon as he or she wakes up in the morning; has the habitual action of rubbing eyes and wiping nose; had eczema as a child; has parents, grandparents or siblings who have suffered from allergic asthma or rhinitis; has food allergies such as seafood, eggs, peanuts, etc.; is prone to spring and autumn red eyes and runny nose; have often had unbearable itching on the body and have suffered from hives.