hi there, if your child is otherwise healthy ie takes his feeds well, has no fever
or any other systemic symptoms then you can try giving him some steam inhalations and physiotherapy
to dislodge the mucous from his URT. If he is breathless or irritable with excessive crying or refusal to feed then you may need to visit a pediatritian who would examine his chest for breath sounds and if there is any obstructive airway problem then give medication accordingly. Take care.