When the upper eyelid is turned over and there is a small white dot rubbing the eye, if the small white dot can be cleaned off with a clean cotton swab, consider the cause of the foreign body. If the foreign body cannot be removed and continues to grind the eye, consider it to be related to wheals, conjunctival stones, etc. Grinding the eye can generally be medically referred to as a foreign body sensation and can be picked out using corresponding medications or by choosing surgery.1. Wheals: Wheals are usually accompanied by pain in addition to a foreign body sensation, and the white dot is the pus head of a pus-like substance formed after the infection of the lid gland; when the condition is mild, patients need to pay attention to eye hygiene and avoid rubbing the eye with their hands. The symptoms may resolve within a few days. If the symptoms persist or worsen, you can take oral amoxicillin capsules in combination with levofloxacin drops, or you can have the pus removed surgically, but do not squeeze it to avoid infection. It is recommended to go to the hospital for treatment by a specialist, such as picking out the stones in the upper eyelid with a sterile needle or blade. 3. Sometimes fire can also cause a small white spot on the upper eyelid to rub the eye, so it is important to avoid spicy and irritating foods such as chili peppers in your diet, and to avoid staying up late and using your eyes excessively in your daily life.