If the eyeball is irritated due to external reasons, and the condition is not serious, it can heal on its own. If the eye congestion is caused by eye disease, timely treatment is required to avoid aggravation of the condition and affecting vision. When your dog’s eyes are congested, you should clean up eye secretions in time to avoid bacteria breeding and causing inflammation. You can also give your dog anti-inflammatory eye drops to help with recovery. In terms of diet, pay attention to feeding a lighter diet and letting the dog drink more water.