Dog conjunctivitis will cause symptoms such as photophobia, red and swollen eyes, pain, increased eye secretions, tearing, and inability to open the eyes. It is best to treat it in time to avoid aggravation of the condition. First, help the dog clean up the eye secretions, rinse the eyes with saline, and then instill anti-inflammatory eye drops. It usually takes about two weeks to fully recover. Be sure to apply the medicine on time, so that it will be effective.