my baby vomited 3 times in morning and started light cough..can u please tell what might be the reason??he is putting all the things into mounth..how to stop it

A. Oral seeking is part of normal development Oral sensory seeking behaviour, or mouthing items, is a normal behaviour in babies and infants. They use sucking to help to calm themselves and self soothe. This self-soothing can also be called self-regulation.