Consult your doctor, teething gels contain a mild analgesic that act as a painkiller. Many teething gels also contain mild antiseptics that kill a variety of bacteria and fungi that might infect sore or broken skin in the mouth. Teething gel is applied by gently rubbing the gel directly onto the gums. They can provide quick relief to your baby's discomfort. It is quite safe to breastfeed while using teething gel.