Children with phlegm in the throat but not coughing can be seen in respiratory infections, congenital laryngeal asthma and other conditions, need to be analyzed on a case-by-case basis. 1. Respiratory tract infections: such as acute upper respiratory tract infections, there may be phlegm in the throat, but not coughing performance, children can appear fever, throat discomfort performance, need to be actively treated, part of the children with the development of the condition of the upper respiratory tract infections can be developed into lower respiratory tract infections, coughing phlegm aggravation of the symptoms. 2. Congenital laryngeal stridor: also known as laryngeal cartilage hypoplasia, commonly found in younger children, most of them are more serious at the age of 6 months, and the symptoms disappeared at the age of 18~24 months, and the above symptoms may appear, and the symptoms may be more serious when they are crying, breastfeeding, or lying on their backs, and the above symptoms may get better as they grow older. It is recommended to consult a specialist for evaluation and clarification of the cause.