The child is 4 years old, recently always rubbing the eyes, there are more reasons, may be visual fatigue, infectious conjunctivitis, allergies and other reasons. 1. Visual fatigue: If the contact with electronic products or watching TV for too long, the child may experience visual fatigue, causing eye soreness, dryness and other discomfort, in order to relieve eye discomfort, the child may appear to rub the eyes frequently. 2. Infectious conjunctivitis: bacterial, Chlamydia trachomatis and other pathogenic infections cause infectious conjunctivitis, under the stimulation of inflammation, the child may appear conjunctival congestion, pain, foreign body sensation and other symptoms, which leads to the child’s old eye rubbing. 3. Allergy: allergic children allergic to the outside air, pollen, drugs, food and other substances, can cause allergic conjunctivitis, the child may appear photophobia, tearing, itchy eyes and other symptoms, resulting in children always rubbing the eyes performance. It is recommended that children with frequent eye rubbing and other discomforts consult a doctor for evaluation of their condition and treatment as prescribed by the doctor.