Usually this is from touching the eyes and transferring bacteria from the hands. If you have
itchy eyes from allergies or dry eyes, you could be
rubbing them a lot. Rubbing the delicate eye tissue causes wrinkles, so there are many reasons to avoid it. Also wash your hands, including the nails on both sides of the nail as a lot of germs hang on there.
Another cause of eye discomfort is dry eyes. Consider whether you eat too many simple sugary foods and processed foods.