Whether your pup’s eyelid is puffy or they have full facial swelling ... Keep an eye out for new lumps or bumps: Check your dog for new growths and visit your vet if anything changes in size or shape.

An eyelid bump is often a stye, a pimple-like bump that can be uncomfortable or unsightly but goes away on its own. Other causes include milia (milium), chalazion, or, in rare cases, skin cancer.