An infant with a fever of 37.5 is considered to have a fever. Normal infant body temperature over 37.3 ℃ is fever, 37.5 ℃ is low fever. Infants due to newborn, body temperature regulation ability is poor, more than 37.3 ℃ for fever, which between 37.4 ~ 38 ℃ is called low fever, 37.5 ℃ is low fever. The cause of the child’s hypothermia should be identified. First of all, the temperature of the environment where the infant is located should be controlled, the room temperature is usually kept at 24~26℃, and the humidity should not be too high. You should also check whether the infant’s clothing is appropriate, to avoid overdressing or wrapping too much and causing a rise in body temperature. If the low fever is not caused by physiological factors, it may be caused by certain diseases, timely consultation, pay attention to observe the performance of infants, such as cough, nasal congestion, runny nose, diarrhea, vomiting, urinary urgency, frequent urination, painful urination, etc. should be treated promptly, and pay attention to the diet of light daily.