Swelling of the white of the eye like a layer of blisters usually refers to the symptoms of conjunctival edema, which may be caused by infection, allergy and other factors. 1. Infection: Pseudomonas aeruginosa, staphylococcus, adenovirus and other pathogenic microorganisms infecting the conjunctival tissues will lead to inflammatory reaction of the conjunctival tissues, and when the condition is serious, the inflammatory exudate can not be absorbed in time, and it will accumulate in the conjunctival tissues, resulting in the symptom of conjunctival edema. 2. Allergy: After contact with dust, pollen and other allergens, the patient will lead to conjunctival congestion and edema, resulting in the whites of the eyes swollen like a layer of blisters, and may be accompanied by eye itching, foreign body sensation, increased secretion and other manifestations. It is recommended that patients go to the hospital in a timely manner to identify the cause of the disease, under the guidance of the physician active treatment.