Summarize the following:
Since viral conjunctivitis is not curable, it can recur after initial treatment. These flare-ups are often caused by stress. Therefore, you should identify and remove potential stressors in your cat’s environment. For example, keep your cat’s daily routine as steady as possible.  If you have multiple cats, make sure each cat has her own ‘supplies’ (e.g., food and water bowls, toys, litter box) to reduce bullying or fighting between cats. Your cat may also feel stressed if she becomes bored. Provide her with plenty of toys and rotate them on a regular basis. Puzzle toys are especially useful for keeping a cat busy and entertained. Herpesvirus requires an amino acid called arginine to replicate. However, when the amino acid lysine is present, the virus will take up lysine instead of arginine, which will stop the virus from replicating. Your veterinarian can recommend a specific oral lysine supplement for your cat. Lysine can be used as a lifelong management option for feline herpesvirus conjunctivitis. The severity of a herpesvirus conjunctivitis flare-up can be reduced with ocular (not injectable) vaccination. The vaccination works by strengthening the immune system and making the flare-up more bearable for your cat. Discuss this vaccination option with your veterinarian. If your cat’s allergies caused her conjunctivitis, then you should reduce her to exposure to the offending allergen as much as possible. For example, if she is allergic to dust, you will need to dust your home more frequently. If she is an outdoor cat, you may need to keep her indoors and away from outdoor allergens like pollen. If your cat's eyes became irritated when you used certain household cleaners, try keeping your cat away from the area where you are cleaning. If your cat’s eyes start to look swollen and red, and you see colored discharge (e.g., green, yellow) coming from her eyes, your cat is likely experiencing a conjunctivitis flare-up. Other signs of a flare-up include increased tear production, squinting, and sensitivity to bright light. When your cat experiences a flare-up, contact your veterinarian about the best way to manage it.

Summary:
Reduce your cat’s stress levels. Supplement your cat’s diet with oral lysine. Consider vaccinating your cat. Minimize your cat’s exposure to allergens. Look for signs of a flare-up.