Nine months baby low fever does not have much effect on the baby, fever is the process of the baby’s own resistance to disease. 1, you can carry out physical cooling, such as wiping the baby’s body with warm water, which can help the baby dissipate heat, drink more water, warm water soak feet. Or use a cold compress, using a towel dipped in cold water and twisted dry, placed on the forehead, armpits, neck and other large blood vessels through the place, which is conducive to cooling the baby’s body. You can also take a warm bath, but it is not recommended to take oral antipyretic drugs. 2, the baby’s acute low fever does not go down, usually caused by infection, should go to the hospital for examination to identify the cause, under the guidance of a doctor to give anti-infective treatment. A small number of children with long-term low fever that does not subside can be seen in rheumatic immune system diseases, blood system diseases, malignant tumors, etc. Therefore, long-term low fever must be taken seriously and should be examined comprehensively at the hospital to clarify the diagnosis and give treatment.