Allergic conjunctivitis is a type of allergic conjunctivitis, which is an immune response to conjunctival allergy. Allergic conjunctivitis is usually not very serious, but it is more serious than seasonal or perennial allergic conjunctivitis, which means that the conjunctival congestion is heavier and the itchiness of the eyes is worse, often requiring the use of hormonal medications to keep it under control. Allergic conjunctivitis is caused by contact lens wear, intraocular jewelry use, and contact allergy, which is an allergy caused by special contact with the eyelids, and allergies come on quickly and aggressively, but fade quickly after reasonable treatment. Therefore, once you have allergic conjunctivitis, you should actively take treatment, which usually does not bring too serious consequences.