There is no fastest and most effective cure for phlegm in infant throat, phlegm in infant throat can be related to nasal inflammation, allergies and other reasons. It can be treated by sinus rinsing and keeping away from allergens. 1. Nasal inflammation: for example, rhinitis, sinusitis caused by increased nasal secretions, nasal snot backflow, stored in the throat, resulting in the baby’s phlegm. Sinus rinse can be used to dissolve the phlegm. 2. Allergy: infants belong to the allergic body, when infants come into contact with some allergens, such as pollen, dust, animal fur and so on. These allergens irritate the throat area, causing the mucous membrane of the throat to secrete a large amount of phlegm. You can stay away from the allergens and relieve the discomfort. There may also be other causes for phlegm in the throat of infants, such as upper respiratory tract infection, etc. It is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy.