The common causes of recurrent cold and runny nose in babies are as follows: 1. Children with recurrent cold and runny nose suggest low immunity or allergic constitution. Children’s low immunity has its own growth and development characteristics, because children are young, immune development is not sound, the body of a variety of immune antibody secretion is insufficient, easy to be infected by viruses or bacteria. 2, in addition, if children have a picky diet or anorexia habits, will lead to malnutrition caused by a decline in resistance, while bad habits, such as the lack of adequate outdoor exercise, is also not conducive to immunity. 3. Children with a history of allergic diseases, such as allergic rhinitis, eczema or bronchial asthma, are also susceptible to recurrent upper respiratory tract infections. Therefore, recurrent colds in children require comprehensive treatment, and parents need to pay attention to the following aspects: medications such as oral lyophilized powder of spleen aminopeptide and pidomod to enhance the immunity of the upper respiratory tract, but the fundamental need to regulate their own immunity.