3-year-old children with red, swollen gums and fever may be caused by colds or oral inflammation, etc., need to clarify the cause of the disease, symptomatic treatment, such as antipyretic, anti-inflammatory treatment. 1. Colds: Children with fever and red swollen gums may be related to colds. It is necessary to give timely antipyretic treatment. If the temperature is below 38.5 degrees, you can wipe the armpits, groin and other parts of the physical antipyretic with warm water, and if the temperature is more than 38.5 degrees, you need to take ibuprofen and other drugs under the guidance of the doctor. Bacterial infection can be treated with antibiotics such as cefixime. 2. Oral inflammation: If the patient has dental caries, it is easy to develop into pulpitis, which can lead to acute periapical inflammation in severe cases, and pain, fever and other symptoms. You can use saline to rinse or wipe the mouth to relieve discomfort, and anti-inflammatory and antipyretic treatment under the guidance of a doctor. 3-year-old child gums red, swollen and fever may also have other causes, it is recommended to go to the hospital in a timely manner, complete the examination to determine the cause of the disease, to give targeted treatment or treatment.