The feeling of something grinding in the eye may be caused by entering foreign body, visual fatigue, dry eye, conjunctivitis, etc. It needs to be treated by applying medication for the cause of the disease together with healthy eye care. 1. Entry of foreign objects: The surface of the cornea contains a large number of sensory nerve endings, and foreign objects such as hair, dust, and dander that enter the surface of the eye irritate the cornea by friction, so this symptom will occur. You need to use saline or flowing water to rinse your eyes, wash your hands, and turn up the lid conjunctiva to remove the foreign body. 2.Visual fatigue: prolonged use of cell phones, television, computers and other electronic products, long-term in the dark or bright light environment and other factors lead to excessive eye use and visual fatigue, so there will be this symptom. You need to use your eyes reasonably and do eye exercises or apply 7-leaf digitalis bisabololol eye drops and Zhenshiming eye drops to relieve visual fatigue. 3. Dry eyes: aging, diabetes, poor air quality and other factors lead to insufficient tear synthesis or excessive evaporation, insufficient tears and dry eyes, foreign body sensation and other symptoms. You can apply sodium vitrate, artificial tears, vitamin A, neostigmine and other drugs, with hot compresses, massage eye treatment. 4. Conjunctivitis: Bacteria and other pathogens infecting the conjunctiva cause exudation, congestion and other inflammatory reactions, so the symptoms will appear. You can apply levofloxacin, erythromycin, dexamethasone and other eye drops for treatment. Pay attention to the use of drugs under the guidance of physicians.