The symptoms don't respond to ordinary diaper rash remedies. Your baby may also be gassy or fussy, frequently pulling off the breast or making clicking sounds while sucking. Your baby may also be without symptoms but will still need to be treated together with you. A newborn baby can acquire thrush in the birth canal during delivery if the mother had vaginal thrush at the time of birth and in this way the baby can infect the mother's nipples during breastfeeding. It takes about 1-2 weeks for thrush to appear in baby's mouth.
Babies are more vulnerable to candida because their immune systems are still immature.
Damage of the nipple can provide an entrance for invading candida. Thrush infections often occur when a mother is over-tired or run down. Women with diabetes or anemia are more susceptible to thrush infections. Use of anti-bacterial soaps decrease the amount of normal bacteria that help protect against thrush. Use of corticosteroids change the body's immune response.