There are many reasons why patients have itchy eyes, mainly due to eye allergies, eye infections, visual fatigue and so on. 1. Eye allergy: some allergic people, in contact with allergens such as pollen, dust, animal hair, etc., can produce allergic reactions, patients can be manifested in the skin, eye, nose side of the redness, swelling, itching and other symptoms. 2. Eye infections: patients with bacterial conjunctivitis, blepharitis and other eye infections, under the stimulation of inflammation, patients may experience discomfort such as redness, swelling and itching of the skin around the eyes, or even eyelid blisters or pustules. 3. Visual fatigue: when patients overuse their eyes to see things, leading to a reduction in eye tears, eye surface lubrication is not enough, itching around the eyes can be manifested, but also accompanied by eye soreness, dryness and other discomforts. It is recommended that patients with significant itchy eyes should seek medical attention to assess their condition and follow the doctor’s instructions for treatment.