A baby canker sore is a small ulcer that looks like a crater or a recess of the oral mucosa. The sores appear inside the lips, on the base of the gums, and the soft palate of the tongue. They develop inside the baby’s mouth as small lesions with red inflamed edges. The size of the sore depends on the type of canker. Complex cankers are larger than 1 cm while simple ones measure 2-3mm. The infection is mostly accompanied by high fever, general uneasiness, and swelling of the throat and lymph nodes. When these occur, visit Chatswood dentists from No Gaps Dental for your baby to receive a proper treatment.