Foreign body sensation in the eyes may be related to foreign body on the surface of the eye, conjunctivitis, dry eye and other reasons. 1. Foreign body on the surface of the eye: If there is a foreign body on the surface of the eye, due to the sensitivity of the eye, the foreign body may stay on the surface of the eye and rub against the eyelid, which will lead to foreign body sensation, tearing and other uncomfortable symptoms. 2. Conjunctivitis: The main cause of conjunctivitis is usually due to infections, immune diseases and other reasons. The main symptoms include red itchy eyes, foreign body sensation, dryness and so on. 3. Dry eye: The normal surface of the eye is moist and lubricated by the tears secreted, if there are different degrees of dry eye, the tears are not enough to lubricate the surface of the eye, you will feel a foreign body sensation. Patients always have a foreign body sensation in the eyes, it is recommended to go to a professional hospital in time for examination and treatment.