There are many causes of red eyes in one year old babies, such as physiological phenomena, conjunctivitis, intraocular foreign bodies and so on. 1. Physiological phenomenon: If the baby cries for a long time and rubs his eyes with his hands, the phenomenon of conjunctival congestion may occur, which is manifested as redness of the eyes, which can be gradually relieved after stopping crying and resting sufficiently. 2. Conjunctivitis: if a one-year-old baby does not pay attention to hygiene, rubbing the eyes with dirty hands, bacteria or viruses and other microorganisms into the eyes, can induce conjunctival infection, in the inflammation stimulation can be manifested in the eyes red, photophobia and other phenomena. 3. foreign body in the eye: if the baby’s eyes accidentally into the foreign body, such as dust, gravel, etc., or the baby’s own presence of inverted eyelashes, in the stimulation of the foreign body, may also show the phenomenon of red eyes. One year old baby eyes red for many reasons, after the symptoms are recommended to go to the hospital in a timely manner to improve the examination, follow the doctor’s instructions to take standardized treatment.