A change from clear to yellow snot in a baby’s cold doesn’t mean anything, it could be a worsening of the condition or it could be related to a bacterial infection. The change from clear to yellow cold snot in babies indicates a change in the snot, which may increase as the condition worsens and may also change in color. Secondly, if there is a secondary or combined bacterial infection, it may lead to increased inflammation and the color of the snot may change from clear to yellow. The baby cold runny nose, need to strengthen the daily care, if necessary, follow the doctor’s instructions to use medication, such as can be used under the guidance of the doctor pediatric cold Ning granules, etc., the presence of bacterial infection can be taken amoxicillin and other medication to alleviate the symptoms.