The stinging pain in the eye is usually caused by the following: 1. It is caused by entropion and impingement of the eyelid, where the eyelashes pierce the cornea, and as the eye turns and the eyelid closes and opens, the eyelashes scratch the corneal epithelium, resulting in eye stinging pain. 2. It is caused by foreign objects such as sand in the eye, resulting in a distinct sensation of friction and stinging in the eye. 3. It is caused by keratitis, where viral, bacterial, fungal infections and echinococcosis can cause inflammation of the cornea. The stinging pain can be caused by inflammation of the cornea due to viruses, bacteria, fungal infections, and echinococcosis. 4. It is caused by electrophthalmia, which is usually associated with ultraviolet light or strong sunlight that burns the corneal epithelium. 5. It is caused by keratoconjunctival dryness, which also occurs due to lack of tear lubrication on the surface of the eye.