The causes of children always sighing mainly include the following situations: due to children’s bad mood, if children are under pressure to study, or have not too smooth things, children will appear bad mood, if children are in a bad mood, often appear always sighing situation, and children sometimes have depression and very irritable state of mind, for this situation, to give children timely psychological The second is due to myocarditis. The second is due to myocarditis, which occurs when a child has an intestinal virus infection that attacks the heart muscle and causes viral myocarditis. Viral myocarditis can cause children to sigh all the time as well as have panic attacks and chest tightness. In this case, the child can be given an electrocardiogram and myocardial enzyme profile test in a timely manner, and if myocarditis is diagnosed, it should be treated in a timely manner to protect the heart muscle.