The baby fever sleep throat sound, can be seen in the respiratory tract infection, such as acute bronchitis, mostly caused by pathogenic infection of the respiratory tract secretion increased due to. Respiratory tract infections are common pediatric diseases, when the baby appeared fever with sleep “phlegm in the throat”, mostly in the lower respiratory tract infections, such as acute bronchitis, most of the symptoms of upper respiratory infections at the beginning of the disease, along with the development of the disease, there can be an increase in the phenomenon of sputum, stimulate the respiratory tract symptoms of coughing, infants and young children often have phlegm is not easy to cough up, and may be In infants and young children, sputum is not easy to cough up, and sputum sounds can be detected in the throat or lungs. The above phenomenon is caused by a variety of pathogens, such as viruses or bacteria, but also for mixed infections caused by respiratory mucosal infections, there is an increase in secretions throat phlegm phenomenon, pathogen infection stimulates the body to appear fever symptoms. Baby body immunity, atopic constitution, nutritional disorders or rickets are risk factors for such cases. Baby fever sleep throat sound, there may also be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.