Patients with itchy corners of the eyes from time to time may be caused by diseases, such as trachoma, allergic conjunctivitis, dry eye, etc., patients need to go to the hospital in time to find out the cause of the disease. 1. Trachoma: Trachoma is a chronic infectious disease caused by Chlamydia trachomatis, often associated with the living environment, malnutrition and other factors. Chlamydia invades the human body and then infects and reproduces in the cells, leading to recurrent infections, and patients often show symptoms such as redness, swelling, soreness, tearing and itching around the eyes. 2. Allergic conjunctivitis: when the patient’s conjunctiva is exposed to pollen, dust mites, animal fur and various allergens, allergic conjunctivitis can be caused, and the patient may have itchy eyes, fear of light, increased secretion and other symptoms. 3. Dry eye: Dry eye patients can appear dry eyes, foreign body sensation and other discomforts, but also can appear corner of the eye pain, photophobia, blurred vision and other symptoms. It is recommended that patients with itchy eyes accompanied by other discomforts should consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.