If you are allergic to eye water, you will experience eye stinging and even a burning sensation, some people also have a transient blurred vision, if more serious will appear the entire eyelid edema, itching, molting or small blisters. Allergies are a sign that the concentration of the drug is not suitable for the physiological properties of human tears, that there are more impurities in the eye water, so it is easy to cause allergies, and that the individual himself is a sensitive body, prone to allergies. If the symptoms of allergy appear: 1, immediately stop using the eye water. 2, use appropriate saline to rinse the eye water that has been used as much as possible. 3, appropriate drops of anti-allergy drugs, oral anti-allergy drugs for symptomatic treatment.