Why is my dog's eyelid swollen and what should I do about the tick I found on it?

Your dog's swollen eyelid could be due to an allergic reaction, injury, or infection. It's important to have a veterinarian examine your dog to determine the cause and provide appropriate treatment. If you find a tick on your dog's eyelid, it's best to carefully remove it using fine-tipped tweezers and clean the area with antiseptic. Be sure to monitor your dog for any signs of illness and consult a veterinarian if needed.