Patients with itchy eyes and sneezing may be caused by allergic conjunctivitis, allergic rhinitis, upper respiratory tract infections and other diseases. 1. Allergic conjunctivitis: When patients suffer from allergic conjunctivitis, it may be the allergic reaction of the conjunctiva of the eyes to external allergens, such as insects and mites, animal fur, etc., which may lead to itchy eyes, sneezing, runny nose and other uncomfortable symptoms. 2. Allergic rhinitis: If the patient has allergic rhinitis, it may be caused by inhalation of allergens in the nasal cavity, such as dust, cold air stimulation, etc., which may lead to itchy eyes, itchy nose, sneezing and other uncomfortable symptoms. 3. Upper respiratory tract infection: If the patient suffers from upper respiratory tract infection, it may be caused by inflammation, cold and so on, invaded by viruses or bacteria, which can lead to patients with itchy eyes, itchy nose, sneezing and other uncomfortable symptoms. It is recommended that patients with obvious symptoms such as itchy eyes and sneezing should consult the hospital in time to assess their condition and follow the doctor’s instructions for treatment.