36℃ does not belong to low fever, because 36℃ is not a fever at all. Normal human body temperature is generally at 36℃-37℃, within 24 hours, the body temperature is higher in the afternoon, slightly higher than in the morning, and slightly higher after strenuous exercise, labor or meal, but the general fluctuation range does not exceed 1℃. The body temperature of women before menstruation and during pregnancy is slightly higher than normal, and the body temperature of elderly people is relatively lower than that of young adults because of their low metabolic rate. In addition, body temperature can also be slightly elevated in hot environments. Fever can generally be classified as low fever, moderate fever, high fever, and ultra-high fever. Low fever is 37.3℃-38℃, moderate fever is 38.1-39℃, high fever is 39.1-41℃, and ultra-high fever is 41℃ or more.