Children’s lower eyelid redness, may be physiological factors, acute injury, mosquito bites, eye inflammation and other factors. 1. Physiological factors: children with excessive hand rubbing the lower eyelid, can make the lower eyelid red, usually no other clinical symptoms, rest gradually ease. 2. Acute injury: children’s lower eye skin suffered an external blow, can also appear lower eyelid redness, can also be accompanied by eye pain and swelling and other symptoms, with the hand pressure, the child’s eye pain will be aggravated. 3. Mosquito bites: more mosquitoes indoors in summer, if you do not take good care of the child’s lower eyelids suffered mosquito bites, will make the lower eyelids red, may also be accompanied by itching, edema and other symptoms. 4. Eye inflammation: conjunctivitis, blepharitis and other inflammatory diseases of the eye children, in the inflammation stimulation, the patient may also appear in the lower eyelid redness, but also eye itching, eye redness, vision loss and other symptoms. It is recommended that children with significant redness and swelling of the eyes should seek medical attention to evaluate their condition and follow medical advice.