The causes of foreign body sensation in the eyes are multiple and may be related to external environmental foreign bodies entering the eyes, excessive use of the eyes, or eye diseases. 1. Foreign bodies: Foreign bodies entering the eyes are mostly found in sand, hair, dander, etc. When these foreign bodies enter the eyes, they can irritate the cornea and cause damage to the eye tissue. You can use water to rinse. If the symptoms are more serious, flushing is not effective, you need to go to a regular hospital for systematic treatment of the eyes; 2, excessive eye: prolonged use of electronic products, study and work for too long to see things easily lead to dry eye, triggering a foreign body in the eyes always feel something grinding uncomfortable, so try to be able to adjust the sitting position when seeing things, maintain a certain distance, diligent eye exercises, drops of eye drops to relieve visual fatigue 3, eye disease: conjunctivitis, trauma-induced keratoconus, glaucoma, and retinal disease after bright light stimulation can cause the phenomenon of foreign body sensation in the eyes always feel something grinding uncomfortable, the treatment needs to be targeted according to the cause of different diseases, such as conjunctivitis often use antibacterial anti-inflammatory eye drops, glaucoma often use Mao Guo Yunxiang alkali eye drops, in serious cases need to In severe cases, laser or drainage surgery may be required. If you have a foreign body feeling in your eyes and feel uncomfortable for a long time, along with other symptoms of discomfort, it is recommended that you go to the hospital in a timely manner to clarify the cause and treat the symptoms. You should pay attention to the reasonable use of eyes, eat more fresh vegetables and fruits to prevent dry eyes, foreign body sensation and other discomfort, also can drink more water or wet compress eyes to ensure the wetness of the eyes to reduce the appearance of symptoms.