Most of the persistent low fever in babies is caused by viral infection, so babies with persistent low fever and further aggravation of symptoms will also have some other accompanying symptoms, such as cough, sneezing, runny nose, loss of appetite, lack of energy and other clinical manifestations, so they need to be actively treated, otherwise the condition may be further aggravated. Anti-viral drugs can be given to babies, together with Chinese medicines used to relieve wind and relieve symptoms, such as Pediatric Fever Reducing Oral Liquid and Pediatric Fever Quick Qing Oral Liquid, which are mainly composed of Chinese medicine and can treat symptoms such as low fever, nasal congestion and runny nose in children, and can be given to babies. In addition to medication, you can also take physical cooling methods, such as applying alcohol to the neck, armpits and groin to dissipate heat, or without alcohol, you can use warm towels to wipe the above areas to achieve the purpose of cooling. In addition, there are also diseases that can cause hypothermia, such as tuberculosis, but this is rare. If the effect of medication and physical cooling is not good and the symptoms are getting worse, you should go to the hospital for further consultation. During the treatment period, it is important to give the child plenty of water and avoid getting cold, but do not wear too much clothing, as this can affect heat dissipation and lead to hypothermia.