Hi Dear ,
Thanks for placing your query through HCM.
It seems that the baby has developed Oral thrush
Oral thrush is a common and usually harmless fungal infection
in the mouth. It mostly affects children under two years of age.
There are several antifungal gels that can treat oral thrush easily like nystatin
Can try either & if no relief in 5-6 days please see your GP.
Hope I have answered your query.