Pain in the corner of the eye after cataract surgery may be caused by increased intraocular pressure, conjunctivitis, corneal epithelial defects, etc. Medication and surgery can be given according to the cause. 1. Increased intraocular pressure: If the intraocular pressure increases on the day of surgery or the next day, it is mostly caused by the residual viscoelastic agent during cataract surgery. You can accelerate the circulation of atrial fluid under the guidance of the doctor, apply the medication to lower the intraocular pressure as prescribed by the doctor, such as Brinzolamide, Hirschsprung’s Eye Drops, or release the atrial fluid through the anterior chamber puncture to lower the intraocular pressure and alleviate the symptoms. 2. Conjunctivitis: Conjunctivitis may be due to postoperative infection by bacteria, viruses, chlamydia and so on. Choose appropriate drugs for local or systemic treatment as prescribed by the doctor. Antiviral drugs include acyclovir eye drops, antibacterial drugs include levofloxacin eye drops or tobramycin eye drops, and antifungal drugs include natamycin and amphotericin B. These drugs need to be used under the guidance of a doctor. 3. Corneal epithelial defects: patients will have tingling, photophobia, tearing symptoms. The cause of corneal epithelium may be preoperative eye wash, intraoperative operation damage to the corneal epithelium and other causes of pain. This kind of pain caused by epithelial damage can gradually improve with corneal epithelial regeneration. There are many other causes of pain in the corner of the eye after cataract surgery, and the treatment varies depending on the cause. It is recommended that those who have the above symptoms go to the hospital in time to have the relevant examination and treatment under the guidance of the doctor.