Why do so many problems occur after eye rubbing? The surface of the human eye is covered with a layer of epithelium, which is very fragile and can be easily damaged by eye rubbing. Our hands often carry a lot of bacteria and viruses, and rubbing our eyes can also contaminate this epithelium. Bacteria or viruses soon take advantage of the situation and multiply, aggravating the damage to the epithelium and resulting in conjunctivitis, such as eye redness, eye grinding, and increased eye discharge. When the eye enters a foreign body, rubbing the eye makes the foreign body on the surface of the eye embedded deeper and more firmly. Patients with high myopia, people with a history of eye trauma, and as people age, the vitreous humor of the human eye can become degenerated and liquefied, and some people have degenerative areas in the fundus of the eye, i.e., around the retina. Eye rubbing can deform the eye, accounting for four-fifths of the volume of the eye, 99% of the water content of the colorless transparent colloid, that is, the vitreous cushion pressure, deformation, which pulls the retina, or with the tightly attached retina separation, causing posterior vitreous detachment, before the eyes appear flying mosquitoes, meshwork, threads, rings, and floating with the rotation of the eye. The posterior vitreous cortex sharply pulls on the retina, the retinal fissure, if not treated in time, there will be retinal detachment, resulting in lifelong vision loss or even blindness, eye atrophy. The harm of eye rubbing is really not small, if eye itching, blurred vision, flying mosquitoes in front of the eye, eye discharge and other eye discomfort, you can no longer rub your eyes, promptly to the hospital for examination, under the guidance of a doctor for treatment.