Red eyes in children may be related to physiological factors, or may be caused by eye inflammation, tear duct obstruction and other reasons. 1. Physiological factors: If the child has recently been sleep deprived for a long time or the eyes into the sand, eyelashes and other foreign objects, may cause red eyes, may also be accompanied by eye itching, eye pain and other symptoms of discomfort. 2. Eye inflammation: conjunctivitis, keratitis and other inflammatory diseases of the eye children, in the inflammatory products of the stimulation effect, can appear red eyes, can also be accompanied by tears, fear of light and other uncomfortable symptoms. 3. Lacrimal duct obstruction: If a child has a blocked lacrimal duct, resulting in tears that cannot be discharged through the nasolacrimal duct in a timely manner, it is easy to induce acute and chronic dacryocystitis, which spreads to the eyeballs and the orbits, resulting in redness of the eyes, which can also be accompanied by tearing, pain and other uncomfortable symptoms. It is recommended that children with obvious redness and swelling of the eyes should seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment.