It may be normal for a preterm baby’s temperature to increase after drinking milk, but it is not normal if it is above the normal range. If the body temperature of a preterm baby increases only transiently after drinking milk, and the temperature does not exceed 37.2 degrees, it is a normal manifestation, which is usually caused by sweating due to excessive exertion in drinking milk. There is no need for special treatment, and it can be relieved in about 30 minutes. If a preterm baby’s body temperature continues to rise after drinking milk, the temperature exceeds 37.2 degrees, and is accompanied by weakness, poor mental state, loss of appetite and other symptoms, it is considered abnormal, and may be due to infection with bacteria, viruses and other microorganisms. Therefore, preterm babies should be observed more often after drinking milk, and if the temperature continues to rise and cannot be reduced, they should consult a doctor in time, and under the guidance of a professional physician to do blood tests to analyze the cause, and then targeted treatment.