What Is a Pimple Core?

The pimple's core holds a plug of dead skin cells and sebum , a natural kind of oil. When you squeeze your pimple, you push this plug further into the affected skin pore. 2 The pressure from the popping also may cause the wall of the pore to burst.

What is the hard white thing inside a pimple?

Pus, a thick, white substance made up of bacteria and white blood cells, sometimes fills the pimple.

Why do some pimples have hard cores?

Hard pimples are caused when dead skin cells, oil, and bacteria get under the skin's surface. Certain types of hard pimples should be treated by a doctor to prevent them from getting worse and leaving scars.