Eyelid long blisters may be caused by eyelid eczema, eyelid fever herpes, eyelid dermatitis and so on. 1. Eyelid eczema: this disease is mainly related to allergies, mainly by a variety of exogenous allergens caused by the body to undergo an allergic reaction, resulting in inflammation of the patient’s eyelid skin, but also may be related to local chronic irritation, hereditary allergies, etc., the patient will appear to have long blisters on the eyelids, accompanied by erythema, pimples, oozing, etc., itching as well as a burning sensation. 2. Eyelid fever herpes: when the patient has upper respiratory tract infection, tension, exertion, the virus is more active when the infection can be triggered, resulting in patients with eyelid blisters, but also eyelid edema, tingling, burning sensation of the eye, and so on. 3. Eyelid dermatitis: This disease may be caused by allergies, infections, medications, heredity, immunity and other factors, the patient will appear eyelid blisters, accompanied by itching, pain and so on. It is recommended that patients with blisters on the eyelids visit the hospital in a timely manner to assess their condition and under the guidance of a doctor.