Analysis of the causes of children’s persistent coughs: Children’s immune systems are relatively fragile and are often attacked by bacteria and viruses, which can easily lead to colds, asthma and other diseases. If a child has a persistent cough, parents need to carefully analyze the cause of the cough. By understanding what causes a cough, we can prescribe the right medicine to more effectively relieve your child\’s symptoms. 1. Cough caused by colds Colds are one of the most common diseases in childhood. Symptoms such as runny nose, fever, and cough appear. Especially within 7 days after catching a cold, persistent cough may occur. If you find that your child has this kind of behavior, parents can give it to them with warm water