The baby’s face is red because the skin reaction is sensitive and other physiological reasons, as well as allergic dermatitis, psoriasis and other pathological reasons. 1. Physiological reasons: baby skin is relatively delicate, sensitive to external stimuli, when stimulated by the external environment, such as hot and cold environmental changes, may make the baby’s face appear a piece of red. 2. Pathological reasons: baby face a piece of red may also be due to certain pathological reasons, such as the baby is allergic, in contact with allergens may appear after the allergic dermatitis, may be manifested in the face of a piece of red. Psoriasis may also cause redness on the baby’s face, with multiple layers of silvery-white scales covering the surface. There may be other reasons for the redness on the baby’s face, so it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.