For mild allergic conjunctivitis, an oral over-the-counter allergy medication may be enough to clear your symptoms within several hours to a few days. If it doesn't go away quickly, it's probably bacterial or viral.  Try an antihistamine. The body reacts to allergens by producing chemicals called histamines, and these chemicals are the culprit behind pink eye and other allergy symptoms. An antihistamine reduces these levels or blocks the histamines completely, thereby stopping your symptoms.  Use a decongestant. While decongestants do not stop the allergen from affecting you, they do control inflammation. In doing so, they can help prevent eye tissue from getting inflamed. Whenever drainage begins to build in your eye, you need to wipe it away to prevent bacteria from festering.  Wipe the eye starting at the inside corner, next to the nose. Gently pass over the entire eye toward the outside corner of the eye. This wipes the discharge away from your tear ducts and safely out of your eye. Wash your hands before and after cleaning your eyes. Use a clean surface for each wipe or pass to avoid getting discharge back in the eye. Immediately discard tissues or disposable eye wipes. Toss any washcloths into the laundry immediately after use. "Artificial tears" can relieve symptoms and flush the eye out.  Most over-the-counter eye drops are mild saline lubricants designed to replace tears. They can soothe dryness associated with pink eye, and they can also wash the eye of contaminants that could complicate and prolong viral, bacterial, or allergic conjunctivitis. Some over-the-counter eye drops also contain antihistamines that are useful in treating allergic conjunctivitis. Soak a soft, clean, lint-free cloth in water. Wring it out to remove excess water and apply it to closed eyes using gentle pressure.  Cold compresses are usually best for allergic conjunctivitis, but warm compresses might feel better. Both warm and cold compresses reduce swelling in the event of viral or bacterial conjunctivitis. Note that...

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Write a summary of the previous text in Vietnamese:
Sử dụng thuốc dị ứng. Thường xuyên lau sạch vùng mắt bị nhiễm bệnh. Sử dụng thuốc nhỏ mắt không cần kê toa. Chườm lạnh hoặc chườm ấm. Tháo bỏ kính áp tròng. Ngăn ngừa lây nhiễm.