To determine whether a child’s body temperature less than 35 ℃ is dangerous, it needs to be determined according to the specific circumstances, including the absence of dangerous situations, if the child’s body temperature less than 35 ℃ is due to improper warming, especially premature babies, in this case, the child can be given appropriate temperature resuscitation, placed in the incubator, the child’s body temperature will slowly return to normal, for this case, as long as the child’s feeding, the spirit is still okay. In this case, as long as the child is still eating milk and is in good spirits, there is usually no major danger. There are also dangerous cases, if the child’s body temperature is less than 35 ℃ is due to serious infection, in this case, in addition to hypothermia, children often do not eat, do not make noise and other symptoms, and even children may have septic meningitis, sepsis, severe jaundice and other symptoms, this situation will often affect the child’s life and health, for the child is more dangerous, we must promptly carry out the corresponding anti-infection and other treatment.