Children sleeping with phlegm sound in the throat, mostly due to congenital laryngeal wheezing, respiratory infections and tonsils or adenoids hypertrophy and other diseases, need to promptly seek medical attention to clarify the cause before treatment. Common causes and treatment 1, congenital laryngeal wheezing: due to calcium deficiency leads to congenital dysplasia and softening of laryngeal cartilage, collapse of soft tissue in the upper part of the vocal cords, phlegm sound in the throat during sleep, with the development and growth of the baby, can gradually improve and heal themselves, this situation can follow medical advice to supplement vitamin D and calcium; 2, respiratory tract infection: common in bronchitis, bronchitis, due to inflammatory response, resulting in increased phlegm in the body, phlegm The accumulation of phlegm, and then produce phlegm sound when sleeping. The cough can be relieved by taking oral solution of Ambroxol Hydrochloride, oral solution of pediatric pulmonary phlegm, fresh bamboo leech, etc. When there is bacterial infection, anti-inflammatory treatment with cephalosporin antibiotics can be used; 3. Tonsil or adenoid hypertrophy: due to inflammatory stimulation, resulting in tonsil or adenoid-like tissue hyperplasia. As the muscles in the throat are in a relaxed state during sleep, it can lead to the formation of phlegm sound due to the enlarged tissues blocking the trachea. It can be treated under the guidance of a medical professional. Note: Parents are advised to encourage their children to drink more water, keep their mouth clean and hygienic, and to exercise appropriately to improve the immunity of the body. Open windows more often to promote air circulation.