37.1℃ is not considered a fever. The normal adult body temperature in the armpit fluctuates between 36.0-37.2℃ and the oral temperature is between 36.0-37.4℃, so 37.1℃ is not considered a fever, but we must pay attention to rest, drink more water, keep warm, increase nutrition and strengthen our body to prevent respiratory infections. In addition, human body temperature fluctuates depending on age, gender and metabolic level. Adult body temperature increases after eating, stress and emotional excitement, while infants and children have low body temperature because their immune function is not yet perfect, and elderly people have low body temperature because of low basal metabolic rate.