Babies always have fever in the middle of the night, consider the following reasons: 1, the baby is awake during the day, the body hormone levels are high, the brain excitement inhibits the rise in body temperature, while at night the child sleeps, in a state of rest, the body hormone levels also fall, causing an increase in body temperature. 2, the attention of adults during the day is mainly on other things, so the baby has a slight fever, parents are difficult to detect, at night the fever will The fever will produce discomfort, affect the baby’s sleep, and be easily detected by parents. If a baby has a fever in the middle of the night, the body temperature should be measured immediately. The body temperature below 385℃ is mainly based on physical cooling, such as warm water wipe, warm bath, drinking more water, etc.; if the body temperature exceeds 38°5℃, oral Tylenol or Merlin can be used to reduce the fever. Fever at night is always considered to be pathogenic infection, and should go to the hospital for routine blood tests to clarify the cause and give anti-infection treatment under the guidance of the doctor.