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Understanding Allergic Conjunctivitis: Symptoms, Causes, and Treatments

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2026.08.21

Understanding Allergic Conjunctivitis: Symptoms, Causes, and Treatments


Hello from BGN Eye Clinic Jamsil Lotte Tower Branch.

While many patients visit our clinic for vision correction procedures and cataract treatments, we also receive a high volume of inquiries regarding allergic conjunctivitis, particularly during seasonal shifts. Today, we will guide you through the causes, symptoms, and treatment options for allergic conjunctivitis; a condition especially prevalent in spring and summer that can significantly disrupt daily life.


What Is Allergic Conjunctivitis?

Allergic conjunctivitis is an inflammation of the conjunctiva, the thin: transparent membrane covering the eye, triggered by airborne allergens such as pollen, dust, or pet dander. When the conjunctiva hypersensitively reacts to these external antigens, it leads to characteristic symptoms including redness, persistent itching, and excessive tearing.


Primary Triggers and Causes

This condition represents an immune system response that occurs when the eyes are exposed to specific foreign substances (allergens). The most common triggers include:

  • Pollen, Dust, and Dust Mites: The most frequent causes, often fluctuating with seasonal changes and indoor/outdoor environmental factors.
  • Pet Dander and Fur: Can induce immediate allergic reactions upon contact with animals.
  • Cosmetics and Contact Lens Solutions: Direct chemical irritants that come into contact with the ocular surface.
  • Air Pollution and Mold: Environmental factors found in humid indoor spaces or areas with high fine particulate matter.

Symptoms typically manifest rapidly, ranging from a few minutes to a few hours, after exposure to these allergens.


Key Symptoms by Progression Stage

While symptoms may subside once allergen exposure stops, careful management is essential depending on severity. Typical manifestations include:

Early-Stage Symptoms

  • Intense, persistent ocular itching and stinging sensations
  • Eye redness and visible blood vessels (conjunctival hyperemia)
  • Excessive tearing and increased eye discharge
  • Often begins in one eye and rapidly affects both eyes

Advanced Symptoms

  • Severe eyelid swelling (edema)
  • Sensitivity to light (photophobia) causing glare discomfort
  • Extreme dryness and gritty sensations
  • Occasional blurred vision if corneal surface irritation occurs


    Effective Treatment Methods

    Unlike contagious viral infections, allergic conjunctivitis can be managed promptly with appropriate antihistamine and anti-inflammatory care.

    • Artificial Tears: Helps flush out triggering allergens while soothing dryness and irritation.
    • Cold Compresses: Temporarily relieves eyelid swelling, heat sensations, and discomfort.
    • Antihistamine Eye Drops: Prescribed by a specialist to swiftly suppress allergic responses and itchiness.
    • Anti-inflammatory Eye Drops: Used under medical supervision (including short-term topical steroids) for more severe inflammation.


      Daily Prevention and Essential Guidelines

      To prevent symptoms from worsening, please keep the following precautions in mind:

      • Avoid Rubbing Your Eyes: Rubbing worsens inflammation, increases corneal abrasion risks, and invites secondary bacterial infections.
      • Practice Frequent Hand Hygiene: Keep hands clean to avoid introducing additional irritants or pathogens to the eye area.
      • Minimize Allergen Exposure: Limit outdoor activities during peak pollen or high fine dust days, and exercise caution around animal dander.
      • Exercise Care in Public Water Facilities: Protect eyes from chlorinated or contaminated water in places such as swimming pools.

      Early Management and Prevention Are Key

      Because allergic conjunctivitis stems from an immune system response, proactive prevention and timely initial care are vital. If you experience any of the following symptoms:

      • Severe itching accompanied by persistent redness
      • Continuous tearing with noticeable discharge
      • Symptoms that progressively worsen despite basic care
      • Blurred vision or associated ocular pain


      We strongly recommend visiting an eye clinic promptly for an accurate diagnosis and tailored treatment plan. Maintaining good personal hygiene and minimizing allergen exposure during high-risk seasons remain your best defenses.

      If you have any questions regarding treatment or eye care, please feel free to reach out to us at any time. Thank you.

      BGN Eye Clinic | Jamsil Lotte Tower Main Branch
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