If your 2-year-old daughter was stung under the eye and now her eye is swollen and watery, you can start by applying ice for 15 minutes at a time to reduce the swelling. It's important to wash the area with water and soap regularly to prevent infection. Avoid scratching the area to prevent further damage. You can give her liquid Benadryl™ every 6-8 hours if needed to reduce swelling and itching. Calamine lotion can also be applied to the sting to alleviate itching. If you notice signs of infection or an allergic reaction, such as extensive redness, heat, pus discharge, or respiratory issues, seek immediate medical attention. If the sting has affected her eye or her vision has changed, it's important to go to the hospital.