Substances that can easily cause allergies are as follows: 1, skin care products and cosmetics 2, hair care and beauty products such as: shampoo, hair dye, perms, etc. 3, drug allergies, certain drugs or eye solutions may cause allergic reactions to people with certain body types 4, pollen and dust in the air can also cause allergic reactions 5, food allergies, contact with dogs and cats and other pets, etc. Precautions in treatment: 1. Eat less or no allergy-prone food, such as crabs, scallops, scallops, sea razor clams and other seafood, as well as spicy and stimulating food. 2, eat more fiber-rich vegetables and fruits such as celery, loofah, parsley, carrots, tomatoes, etc. 3, do not rub your eyes. Allergic constitution and low immune system people are prone to this disease, should strengthen the exercise, conditioning body. 4, if necessary, acupuncture treatment is feasible.