Itchy corners of the eyes can be caused by many reasons, but the common cause is still due to allergies, which is often referred to as allergic conjunctivitis. With the development of medical technology, there are more and more medications to treat allergic conjunctivitis, but the real revolutionary treatment change is the discovery of the pathogenesis of allergic conjunctivitis, which is the allergic reaction caused by exposure to allergens, so anti-allergy is the main treatment method. Because of the diversity of allergic conjunctivitis symptoms, the choice of treatment medication is different, so it is necessary to take a detailed history and symptoms and then develop a thorough treatment plan to achieve good results. The general approach to treatment is to first shed allergens (actively avoid contact or shield yourself from allergens), and secondly to give detailed medications, including antihistamine therapy (emetine drops), mast cell stabilizers (sodium cromoglycate drops), nonsteroidal anti-inflammatory drugs (aspirin), vasoconstrictors (oxymetazoline), and glucocorticoids (dexamethasone). Because there are many drugs, it is difficult for non-specialists to be familiar with the principles, and the variability of each individual makes it more difficult to control the use of medication, so you cannot buy medication to use on your own. In summary, the medication for allergic conjunctivitis requires a specialist to use the medication according to the specific situation of the patient, and to actively cooperate with the treatment in order to solve the disease as soon as possible.