Babies with oral ulcers definitely need active treatment. There are many common causes of oral ulcers. If it is caused by viral infection and accompanied by fever, children should be given some antiviral medications. If the body temperature exceeds 38.5 degrees, fever-reducing medications should be administered. Additionally, local ulcers can be treated by applying some mucosal protectants to promote the healing of the ulcers. At the same time, administering some compound B-group vitamins to the child is also very important for the repair of oral ulcers. Furthermore, it is important to strengthen the adjustment of the child's dietary structure. Ensure a diet rich in a variety of vitamins from fruits and vegetables. If the child's oral ulcers are caused by a bacterial infection, antibiotics should be used under the guidance of a hospital doctor. Local oral ulcers should still be treated with mucosal protectants and healing agents. Meanwhile, timely supplementation of B-group vitamins is necessary.