A little redness in the eyes of a 2-year-old child may be caused by factors such as playing with a cell phone for a long time, getting foreign objects into the eyes, or it may be caused by eye diseases such as conjunctivitis. 1. Playing with cell phones for a long time: if children continue to look at cell phones with their eyes for a long time, it may lead to eye fatigue, which may lead to symptoms such as dryness, congestion and redness of the eyes. 2. Foreign objects in the eyes: If a child’s eyes accidentally get into foreign objects such as sand, crushed hair, shower gel, etc., they may irritate the eyes or produce a feeling of friction, which may lead to eye congestion and redness. 3. Conjunctivitis: it may be caused by bacterial infection, viral infection, allergic reaction, etc. The more common clinical symptoms include redness of the white part of the eye, increased secretion, etc., often accompanied by a tingling sensation and burning sensation. It is recommended that parents be more attentive to accompany their children, do not let them look at the cell phone for a long time, usually go out, hair cutting, bathing, but also pay attention to not let the foreign body into the child’s eyes, if the child’s eyes are red and accompanied by other uncomfortable sensations, should be timely medical treatment, so as not to delay the condition.