Children are easily to get allergic reaction from allergens of various resources, for example, food, air, dust, pollen or pet dander. It will cause sneezing, runny nose, eye itching. Normally children are tending to rub their eyes because of its itching. If they got allergens on their hands, then it would definitely make the infection as well as itching worse. You should have your child out of touch with any possible allergens. Keep her eyes and hands clean with mild soap. Wash her eyes with water to make sure the allergens out of eyes. Use an air purifier and humidifier. Air purifier can filter possible dusts and allergens while humidifier can add some moist to the air to relieve the itching and dryness. If you found her allergic reaction keep worsening, then contact her doctor at once. Some serious allergic reaction might cause breathing difficulty which could be very dangerous.