Suddenly swollen eyes of dolls may be caused by insect bite dermatitis, allergic dermatitis and blepharitis. 1. Insect bite dermatitis: For example, if you are bitten by ticks or mosquitoes, your eyes may suddenly appear swollen and the local color is red. 2. Allergic dermatitis: contact with allergens, such as environmental allergies, dietary allergies, etc., may cause allergic dermatitis, which leads to eyelid swelling, redness and itching, and a red rash. 3. Blepharitis: also known as granuloma, with the infection of inflammation, such as staphylococcal infection, there will be eyelid redness, swelling and pain and other symptoms, severe localization may form hard knots or pus discharge. Sudden swelling of the doll’s eyes is recommended to be observed first, if the swelling does not subside for a long time or there are other complications should be promptly consulted.