Red, itchy eyes in children may usually be caused by allergies and require the use of anti-allergy drops, mainly Olopatadine drops, because these drops are dual-action anti-allergy drops that usually work fast and last longer, and have fewer side effects on small children, even with long-term use, with minimal impact on the eyes. If the symptoms are mild, you can use pyrimethamine potassium or emetine or sodium cromoglycate drops, all of which can play an anti-allergic role. If the symptoms of redness and itchiness are severe, you can use hormonal medications such as Flomipron or Dimethoate eye drops first, and then switch to Olopatadine eye drops after 1-2 weeks to maintain the symptoms under control, which is a relatively fast and reasonable treatment plan.