Bump Dog Eyelid. Fortunately, most of these are benign. Styes occur in a dog's eye because a bacterial infection has caused an inflammation of the eyelid glands and at least one small, red bump on the lid itself.

Common dog eyelid problems include: A sty is a lump which appears on the eyelid of dogs, also known as a hordeolum.the swelling is usually temporary, but they can grow to be quite large. Styes are very common in humans, but in dogs they are actually rare.