Infants with fever of 38 degrees is a low-grade fever that lasts overnight and does not go away, it is recommended to seek immediate medical attention to identify the cause of the fever and give symptomatic and causative treatment. 1. Symptomatic treatment: for fever, if the temperature does not exceed 38.5 degrees, you can give physical cooling, such as reducing the baby’s clothing, drink more water, wipe the forehead, neck, armpits, inguinal area and other parts of the warm water, to promote the body to dissipate heat. If the temperature exceeds 38.5 degrees, also need to follow the doctor’s instructions with medication to reduce fever, such as ibuprofen suspension solution and other drugs to reduce fever. 2. Causal treatment: the cause of fever in infants is mainly infections, but also need to exclude rheumatic immune diseases, oncological diseases and other factors, you need to go to the hospital pediatrics in time to improve the blood routine, blood culture and other related examinations, to clarify the condition, to give targeted treatment. Infant fever of 38 degrees, lasted for one night, the cause of the complex, should promptly consult a doctor, under the guidance of the doctor for treatment.