Swollen eyelids and blisters on the eyeballs may be caused by trauma, acute conjunctivitis, allergies and other reasons. 1. Trauma: If the eye area is hit or violent, it will easily lead to congestion and swelling of the surrounding soft tissues, resulting in blisters on the swollen eyelids and accompanied by increased intraocular pressure. 2. Acute conjunctivitis: When patients have acute conjunctivitis, it may be caused by bacterial or viral infection. In acute attacks, it may cause eyelid swelling and blisters on the eyeballs. 3. Allergy: If the patient belongs to the allergic body, in contact with allergens, such as dust, pollen and other stimuli, may lead to allergy, allergic conjunctivitis, causing eyelid swelling blisters on the eyeball phenomenon. Patients with swollen eyelids and blisters on the eyeballs should go to the hospital in a timely manner, and after clarifying the cause of the disease, give appropriate treatment and therapy under the guidance of the doctor.