Pain after cataract surgery may be due to surgical incision pain, postoperative infection, postoperative high intraocular pressure, and damage to the corneal epithelium during surgery. 1. Surgical incision pain: If the surgical incision is large, the postoperative trauma will be greater and the postoperative pain will be more obvious. 2. Postoperative infection: If the operation or postoperative care is not proper, there is a possibility of infection, resulting in postoperative pain. 3. Postoperative high intraocular pressure (IOP): Visco-elastic residue during surgery and inflammatory reaction will cause postoperative IOP to rise, and the patient may experience eye distension and pain, which may be accompanied by a headache. 4. Corneal epithelial damage during surgery: Inadvertent damage to the corneal epithelium during surgery will cause postoperative pain, which will disappear after the corneal epithelium grows back. In order to minimize the pain reaction after cataract surgery, strictly follow the aseptic operation during the surgery and strengthen the nursing care after the surgery to prevent the occurrence of infection. If you have pain after cataract surgery, go to the hospital in time and have your doctor clarify the cause of the pain and then treat it accordingly, which will help your condition to recover.