It takes about 2 weeks for a baby with a mouth full of ulcers to gradually recover. Ulcers in the baby’s mouth may be caused by nutritional imbalance and vitamin and trace element deficiencies in the body. For simple mouth ulcers, mainly one or several round and oval white ulcers in the mouth, the treatment should let the baby drink more water, eat more fresh vegetables and fruits, you can also squeeze the fruit into juice for the baby to drink. In addition, a light, easy-to-digest diet should be used to keep the bowels open. The main symptom is the appearance of small blisters in the mouth, which can easily break down, leaving a congested, red, swollen and eroded surface of the oral mucosa. You can give your baby the right amount of antiviral medication, such as Banlangen oral solution, to shorten the course of the disease.