Chronic conjunctivitis, allergic conjunctivitis such as spring allergic conjunctivitis and seasonal allergic conjunctivitis, can feel itchy eyes. If it is itchy all the time consider seasonal or perennial allergic conjunctivitis, you can use sodium cromoglycate eye drops before the attack to prevent itchy eye attacks. If the eyes are very itchy, you can use anti-itch or vasoconstrictor medications and anti-allergy medications such as nalmivir, olopatadine, emetine fumarate and hormonal eye drops. Hormonal eye drops are used when the allergy symptoms are very severe and the effect of using the above anti-allergy eye drops is not obvious.