How long it takes for conjunctivitis to heal is mainly related to the specific type, treatment and the individual patient, and should be analyzed on a case-by-case basis, not as a generalization. Conjunctivitis is a relatively common clinical ophthalmic disease, and the main types are viral conjunctivitis, bacterial conjunctivitis, immune-related conjunctivitis, non-infectious conjunctivitis, and allergic conjunctivitis. In the case of allergic conjunctivitis, it may heal in 1-2 hours when the patient is removed from the allergen, such as dust, and anti-allergy medication is administered under medical supervision. Viral conjunctivitis, on the other hand, is self-limiting and usually recovers within 2 weeks, even if the patient does not undergo treatment. In addition, patients with conjunctivitis should keep their eyes clean, use electronic products as little as possible, give their eyes adequate rest, flush the conjunctival sac with saline if there is a lot of secretion, and avoid seafood and spicy stimulating foods.