If the baby’s back is sweaty, but the hands are cold, which is usually caused by metabolism, cold, or gastroenteritis and other infections: 1, metabolism is too fast: the back of the baby at the trunk, and the hands are located at the extremities, due to incomplete development, body temperature regulation ability is not as good as adults, may appear cold hands, body temperature is lower than the trunk, but the baby metabolism is fast, the back due to heat dissipation will appear sweaty; 2, cold: the baby because of the sudden rise in body temperature, the back sweat heat dissipation, and the hands because of the clothing wrapped, the back is exposed. The infant’s body temperature rises suddenly, because the clothing generally only wrapped body and hands exposed, body temperature is high, the torso because of clothing wrapped, back sweating heat dissipation, while the hands because of the naked, but the temperature is lower; 3, gastroenteritis: infants due to overfeeding and eating unclean food, easy to cause indigestion and gastroenteritis, therefore leading to diarrhea, fever and other symptoms affect the normal regulation of body temperature, the leading to symptoms of sweaty backs and cold hands. From a TCM perspective, this condition in infants is a sign of Yang deficiency. Yang energy has the function of warming the limbs and lungs, if Yang is deficient, the body function is reduced and signs of coldness appear. You can eat more black beans, sesame seeds, yam and other foods that warm the yang energy and avoid cold and raw foods; you can also do massage appropriately. Some people prefer to improve their Yang deficiency body by moxibustion, which can stimulate the body’s meridian points through the heat generated by burning mugwort, in order to warm the meridians and disperse cold, and harmonize yin and yang. Moxibustion of the foot three miles or the lung points on the back of children can strengthen the body’s qi and blood flow and improve yang deficiency, but attention should be paid to the age of children, as babies have delicate skin and moxibustion and other operations are not recommended at will and need to be determined by a professional doctor.