External blepharitis is mainly caused by bacterial infection resulting in suppurative inflammation of the blepharoplasty, the treatment is mainly to anti-inflammatory drugs used mainly. Generally the topical drugs are levofloxacin and tobramycin eye drops, which can be used 4-6 times a day. It can also be combined with gatifloxacin eye ointment or ofloxacin eye ointment, which can be applied to the eyes before bedtime to ensure a certain antibiotic efficacy while sleeping at night. If the redness, swelling, and pain of the blepharitis worsens and is not controlled with topical medications, oral antibiotics are needed for systemic treatment. Common oral medications are cephalosporin or amoxicillin antibiotics, which, when combined with topical medications, can help the blepharitis get better faster and shorten the course of treatment.