The first thing you should do is to determine the nature of the pain, whether it is a pins-and-needles pain or a dull swelling pain, whether it is transient or persistent, and how intense the pain is. If the pain is a transient pins and needles pain and can be relieved with rest, it may be caused by eye fatigue and eye dryness due to excessive eye use. If it is a persistent pinprick-like pain, it may be due to corneal epithelial abrasion, electrophthalmia, which is often severe but can be identified by the pain disappearing immediately after dropping surface anesthetics. Such pain can also occur with keratitis and severe conjunctivitis, often accompanied by increased ocular discharge. If the pain is dull and distended, it may be glaucoma, acute iridocyclitis, or endophthalmitis, where glaucoma pain varies in severity from vague to bursting pain (mostly seen during acute attacks of glaucoma); acute iridocyclitis, endophthalmitis, and allodynia are all severe and are associated with severe vision loss. If there is rotational pain in the eye, i.e., pain that is noticeable when turning, it may be due to severe visual fatigue or retrobulbar optic neuritis. Therefore, eye pain can occur in a variety of ophthalmic diseases, so if it occurs, please seek prompt medical attention to identify the cause.