Under normal circumstances, a small child’s breathing is smooth and does not show shortness of breath. When there is coarse shortness of breath, most consider that the baby is sick. There are several common causes of wheezing in babies. First consider that the child may have a respiratory infection. If the child has a respiratory infection, there are often symptoms of rhinitis and nasal secretions that lead to coarse wheezing. When a child has an infection of the trachea or lungs, there may be increased respiratory rate, and there may also be wheezing. If a child has wheezing, it may also appear on the surface as wheezing. When a child is sick and has a fever, his or her breathing increases as the body temperature rises, and he or she may also experience wheezing. Finally, wheezing may also occur when a child is constantly exercising and has too much exercise. Rarely, a child with chronic lung or heart problems may also experience shortness of breath with a little activity. When a child is wheezing, we need to check to make sure that the child has any relevant abnormalities, with respiratory infections being the most common cause. Active control of respiratory infections and symptomatic treatment can relieve the wheezing phenomenon more quickly.