Small white bumps filled with keratin that often appear on the face are known as:

Milia are small white bumps that form when keratin, a protein found in the skin, gets trapped beneath the skin's surface. These cysts are often found on the face, particularly around the eyes and cheeks, and are common in newborns and adults. Their appearance is typically small, round, and white, making them easily identifiable. Unlike other skin conditions, milia do not typically irritate the skin or cause inflammation. Their presence is primarily a cosmetic concern rather than a medical one, which makes understanding them important for anyone working in skin care.

In contrast, moles are generally pigmented spots on the skin, verrucas are a type of wart caused by a viral infection, and comedones refer to clogged hair follicles, which can lead to acne. Each of these conditions has distinct characteristics and causative factors, differentiating them from milia.