The foreign body sensation in the corners of the eyes of patients may be related to the invasion of foreign bodies, ocular surface diseases, intraocular swelling and other reasons. 1. Foreign body invasion: if sand and other foreign bodies enter the eye, it can stimulate the conjunctiva in the corner of the eye, causing the patient’s corner of the eye grinding panic, foreign body sensation and other uncomfortable symptoms. 2. Ocular surface disease: keratitis, conjunctival stones and other ocular surface disease patients, because the corneal nerve density is large, high sensitivity, the patient may appear in the eye foreign body sensation and other uncomfortable symptoms. 3. Intraocular swelling: patients with eyelid abscesses, conjunctival cysts and other ocular swellings may also experience discomfort such as a foreign body sensation in the eye. It is recommended that patients with obvious foreign body sensation in the eye go to the hospital in time to clarify the cause of the disease and carry out standardized treatment under the guidance of the doctor.