Erythromycin ointment can be applied the day after double eyelid surgery if there are signs of infection. Double eyelid surgery includes double eyelid buried line, incision blepharoplasty, Korean-style minimally invasive blepharoplasty, etc., usually localized there will be a certain incision. After double eyelid surgery, there may be redness, swelling, pain, etc. If you consider infection, you can apply erythromycin ointment under the guidance of the doctor on the next day. Erythromycin ointment is an antibiotic drug, which can inhibit and sterilize bacteria and play the role of antibacterial and anti-inflammatory, and it can also prevent the wound from getting infected. Note that after the double eyelid should maintain a light diet, avoid spicy stimulating food, such as chili peppers, onions, etc. If the redness, swelling, pain and other conditions have not improved, it is recommended to go to the hospital in time to see a doctor.