If the child’s temperature remains at 35.5°C due to low ambient temperature, there is usually no risk. If the child’s temperature is 35.5°C all the time caused by sepsis, etc., it may be life-threatening. If the child has been in a cold or low-temperature environment for a long time, the temperature may be 35.5°C. This is generally a normal physiological phenomenon and is not life-threatening, and the child’s temperature will gradually return to normal if he or she is transferred to a moderate temperature environment. If the child has sepsis, it may also lead to a body temperature of 35.5 ° C, the child may also be accompanied by increased heart rate, decreased blood pressure, increased respiration, decreased urinary output, bleeding under the skin and mucous membranes and other symptoms, and some patients may be serious cardiac arrest, coma, infectious shock and other dangerous situations. In addition, children’s body temperature has been 35.5 ° C may also be hypothyroidism, pituitary tumor and other diseases, these diseases may also be dangerous to the body. It is recommended that if a child’s temperature remains at 35.5°C, parents need to take the child to the hospital for a checkup.