The common causes of red blood on the face of young children include physiological factors, physical stimulation, medication factors, and so on. 1. Physiological factors: In general, the young child’s own facial stratum corneum is relatively thin, the skin is relatively tender, if a small amount of redness on the face, is a normal phenomenon; in addition, there is a family history of capillary dilatation, then the face will also appear the phenomenon of redness. 2. Physical stimulation: If you are exposed to sunlight for a long time or live in the plateau area, it is easy to lead to the expansion of capillaries in the face, which will lead to the phenomenon of redness in the face. 3. Drug factors: if the face of long-term use of some hormone drugs, such as dexamethasone, hydrocortisone, etc., easy to lead to local skin thinning, capillary expansion. It is recommended to go to a regular hospital to clarify the cause and follow the doctor’s instructions for treatment.