Sudden swelling of the whites of the eyes in the form of transparent blisters is considered to be bulbar conjunctival edema, which may be caused by allergic conjunctivitis, blockage of lymphatic vessels, blepharospasm, and so on. 1. Allergic conjunctivitis: it is due to bacterial and other microbial infections, such as pollen, dust, dust mites, cosmetics, various microbial proteins and so on. It can lead to sudden swelling of the whites of the eyes in the form of transparent blisters, itchy and congested eyes and other symptoms. 2. Lymphatic vessel blockage: it may be caused by long-term inflammation, or it may have a lot to do with regular eye make-up, ocular lymphatic vessel blockage can lead to sudden swelling of the white of the eye with transparent blister-like, generally part of the person will be absorbed by themselves. 3. blepharospasm: with long-term dust mites, sunlight and ultraviolet irradiation or welding stimulation, etc., belongs to the conjunctival degenerative lesions, mostly occurring in the middle-aged and elderly patients, can be manifested in the blepharospasm area of the conjunctiva yellowish-white, blister-like changes, accompanied by dryness, foreign body sensation and other symptoms. Sudden swelling of the white of the eye transparent blister-like, there may be other reasons, it is recommended that the patient consult a doctor in a timely manner, please ask the doctor to clarify the specific causes, and if necessary, to carry out the appropriate treatment.