Oral thrush appears as milky, white patches on the insides of a child's cheeks, tongue or lips and cannot be wiped away easily, as the infection is under the skin. The patches might also appear red or inflamed. Usually, the infection doesn't cause irritation, however if the mouth area is very red and raw, it might be hard for your child to eat. Another sign that your child may have an oral thrush infection is drooling.
Thrush can also appear in the nappy area.
To be sure, get your PD to check on baby especially if it is hurting.
Your doctor can prescribe your child antifungal drops or gel to help manage the infection. If you are breastfeeding, your doctor might also prescribe an antifungal gel for your nipples. This is because you might be spreading the infection to your child when feeding. You can continue to breastfeed as usual if your baby has oral thrush.