The redness and swelling of the lower eyelids of small infants may be related to allergic conjunctivitis, blepharitis and other factors. 1. Allergic conjunctivitis: mainly because the baby’s body immune system function is not yet very perfect, prone to allergic diseases, when encountered with air pollution or pollen particles in the air easily caused by eye allergies, thus causing redness in the corners of the eyes. 2. blepharitis: mainly because of the little baby resistance is not very perfect, and the environment in the presence of a large number of bacteria, thus invading the body, the formation of blepharitis, is a kind of eyelid gland of acute purulent inflammation. The lower eyelids of small infants are red and swollen, and other factors are also considered, it is recommended to do the relevant examination in a timely manner, to clarify the diagnosis, and to give appropriate treatment.