The redness of the baby’s skin is considered to be related to physiological factors, and may also be triggered by various factors such as colds and allergies. 1. Physiological factors, the baby is relatively small, the body’s metabolic rate is relatively fast, blood circulation is rich, there may be red skin symptoms. 2. Colds, the baby cold after the thermoregulatory center is affected, body temperature gradually increased, capillary expansion, may appear skin redness symptoms. 3. Allergy, if the baby is exposed to substances that are easily allergic to, it may lead to an allergic reaction, so the redness of the skin will appear, accompanied by itching, rash and other reactions. Redness of the baby’s skin, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.