Itchy eyes, itchy nose, sneezing and runny nose may be caused by common cold, allergic rhinitis with conjunctivitis and so on. 1. Common cold: common cold is usually caused by bacterial infection or viral infection, which may be induced by cold, exertion, etc. The patient will show clinical manifestations such as fear of cold, body aches, sneezing, runny nose, itchy nose and itchy eyes. 2. Allergic rhinitis with conjunctivitis: If the conjunctiva of the patient’s eyes comes into contact with allergens, such as pollen, dust, etc., it may cause allergic rhinitis with conjunctivitis, which will also cause the patient to experience sneezing, itchy nose, itchy eyes, runny nose and other symptoms. Itchy eyes, itchy nose, sneezing, runny nose may also be other causes, it is recommended to consult a doctor in time to clarify the cause of treatment.