Can erythromycin ointment be used for swollen eyes?
Swollen eyes usually should not be treated with erythromycin ointment. If discomfort occurs, it is recommended to seek medical attention promptly.

Eye swelling may occur after staying up late or experiencing excessive eye fatigue from prolonged use of electronic screens such as mobile phones and computers, after intense sadness or excessive crying, or following insect bites. Erythromycin ointment is a macrolide antibiotic that works by inhibiting bacterial protein synthesis and has antibacterial effects against Gram-positive bacteria and *Chlamydia trachomatis*. The base ingredients of erythromycin ointment—white petrolatum and liquid paraffin—can cause irritation to the eyes; therefore, patients with eye swelling should not use this ointment.
Organ-related diseases, such as those accompanied by cardiac or renal insufficiency, may also lead to eyelid swelling in the morning. Additionally, local eye conditions such as hordeolum (stye), keratitis, conjunctivitis, and orbital tumors can all cause eye swelling. In such cases, proper treatment under a doctor's guidance is necessary based on the specific diagnosis. After eye swelling occurs, applying a cold compress using an ice pack wrapped in a towel may help constrict blood vessels and relieve discomfort. Furthermore, drinking adequate water can promote metabolism.
In daily life, it is recommended to maintain a light diet, keep the eyes clean and hygienic, and take protective measures, such as using mosquito nets and mosquito repellents at home, to prevent mosquito bites and insect exposure.