Blinking and feeling a foreign body sensation in the eye may be caused by conjunctivitis, conjunctival stones or inverted eyelashes. 1. Conjunctivitis: commonly caused by bacterial, viral and chlamydial infections leading to conjunctival inflammation, due to inflammation, conjunctival congestion, edema, so when blinking feel a foreign body sensation in the eye. 2. Conjunctival stones: small hard, yellow dotted protrusions appear on the surface of the conjunctiva, which are mostly solidified by the aggregation of shed epithelial cells and degenerated leukocytes. When the stones protrude, a foreign body sensation in the eye occurs. 3. Inverted eyelashes: due to eyelid and conjunctival infections or scarring of the eyelid margins, it is easy to cause the eyelashes to fall back towards the eyeballs, irritating the cornea and the bulbar conjunctiva, and causing a blinking sensation of a foreign body in the eye. When blinking and feeling a foreign body sensation in the eye, it is recommended to consult a doctor in a timely manner and follow the doctor’s instructions for further examination to clarify the cause and carry out targeted treatment.