The difference between allergic conjunctivitis and bacterial conjunctivitis mainly lies in the different causes, different symptoms and different treatments. 1. Causes: Allergic conjunctivitis is caused by contact of the conjunctival tissues of the eyes with allergens such as pollen, willow, smoke, etc., while bacterial conjunctivitis is caused by infection of the conjunctival tissues of the eyes due to bacterial contamination in the external environment. 2. Symptoms: Bacterial conjunctivitis patients mainly manifested as eye congestion, eye yellowish-white secretion, etc., while patients with allergic conjunctivitis mainly manifested as eye itching, eye transparent and pulling secretion. 3. Treatment: Bacterial conjunctivitis patients need to follow the doctor’s instructions to use antibiotic eye drops treatment, such as levofloxacin eye drops, tobramycin eye drops, etc., and allergic conjunctivitis patients need to follow the doctor’s instructions to use anti-allergy eye drops treatment, such as azelastine hydrochloride eye drops, orotate hydrochloride eye drops. It is recommended that patients with conjunctivitis seek timely medical attention to assess their condition and undergo treatment under the guidance of a doctor.