Whether itchy eyes can use erythromycin ophthalmic ointment needs to be decided according to the cause of the disease, if it is a sensitive bacterial infection can be used, if it is caused by allergies and so on do not use this product treatment. 1. Can be used: erythromycin ophthalmic ointment on gram-positive bacteria, and Chlamydia trachomatis play an antibacterial role. Used for conjunctivitis, blepharitis, trachoma, external eye infections. Itchy eyes belonging to the above causes can be treated with this product. Adverse reactions to this product include eye pain and vision changes. It is prohibited for those who are allergic to this product. 2. Unsuitable for use: If the itchy eyes are caused by allergic diseases such as allergic conjunctivitis, or conjunctivitis caused by viral infections and other diseases, erythromycin ophthalmic ointment is generally not used for treatment, and it can not achieve the therapeutic effect. Allergic people need to use anti-allergy drugs such as cetirizine, viral infections need to use antiviral drugs such as acyclovir eye drops. Drugs need to follow the doctor’s instructions, the existence of itchy eyes, should be reasonable treatment by the doctor according to the cause of the disease, do not blindly use their own medication.