If the left eye falls into something and keeps grinding, it can be treated by rinsing with running water, dipping wet cotton swabs, etc. If it is a corneal foreign body, corneal foreign body removal is needed. 1. Rinse with running water: when the left eye falls into something, the symptoms of grinding all the time, you should avoid rubbing the eye with your hands, you need to use running water to rinse the eye, in the process of rinsing need to be done to turn the eyes of the action, is conducive to the discharge of foreign bodies. 2. Wet swab dipping: Usually, after rinsing with running water, if the foreign body is still not discharged, a wet swab can be used to try to dip the foreign body out. 3. Corneal foreign body removal: If the corneal foreign body, you need to go to the hospital ophthalmology in time, you can topical drops of surface anesthesia drugs, and then use a sterile syringe needle to remove the corneal foreign body. After the corneal foreign body is removed, antibiotic eye drops should be used to prevent eye infections, commonly used drugs are mainly levofloxacin eye drops, tobramycin eye drops and so on. The left eye fell into something has been grinding, avoid blindly rubbing the eye, if necessary, seek medical treatment as soon as possible, operated by a doctor to remove the foreign body.