One and a half year old baby mouth ulcers and also fever can be maintained through oral hygiene, physical cooling, medication to alleviate the symptoms. 1. maintain oral hygiene: mouth ulcers can generally be self-healing, in the physical cooling at the same time, the need to maintain the baby’s internal oral hygiene, is conducive to the healing of mouth ulcers. 2. Physical cooling: If the body temperature does not exceed 38.5 degrees, you can take physical cooling. Such as reduce clothing cover, with warm water to the one and a half year old baby bath, give the baby drink more water. 3. medication: if the body temperature does not exceed 38.5 degrees, and there is a sense of discomfort, can be through the ibuprofen or acetaminophen and other drugs to reduce fever treatment. If the mouth ulcers do not improve, you can use epidermal cell growth factor spray to spray the baby mouth ulcers, reduce local discomfort, promote the healing of ulcers. All of the above medications should be used under the guidance of a doctor, avoid self-medication. One and a half year old baby mouth ulcers and fever symptoms, it is recommended that timely hospitalization to improve the examination, to clarify the cause of the disease, and follow the doctor’s instructions for treatment.