Herpes zoster is mainly caused by the herpes zoster virus infection. After the disease, small blisters appear on the half side of the eye, which cause severe pain when they rupture. After a herpes zoster attack, there will be lesions on the skin of the eye, which may be oozing and scaly, and may be accompanied by local irritation, such as pain, itching, and a burning sensation in the eye. You can use hormonal eye ointment and eye drops to reduce the symptoms, you can use flumetron eye drops, sodium vitreous eye drops, after the lesions have completely subsided, the symptoms will improve.