According to theCleveland Clinic, milia aresmall white spotsthat usually occur around the eyes.

It’s also a building block of the skin, particularly the outer layer known as the epidermis.

This particular protein is one of the many building blocks of your body (via theCleveland Clinic).

Woman applying spot cream to face

Still, it can sometimes cause a problem on the outer layer of the skin.

According toWebMD, milia occur when dead skin cells get trapped under a new layer of skin.

The keratin then hardens and becomes a visible spot known as a “milium.”

Milia on someone’s cheek and eye

Depending on how much keratin has been trapped, milia can vary in size and quantity.

Milia around someone’s eyes and eyelids