Papules are small bumps under the surface of the skin.
They are solid. And the skin around them appears red, swollen and tender.
Small white or flesh-colored bumps on the skin.
If you try to pop the whiteheads, nothing will come out.
Nodules are hard lumps that form deep under the surface of the skin.
They can become inflamed, quite painful and tender.
Cysts are large soft lumps deep under the surface of the skin.
They look like boils and are filled with pus. And can be red or white in color.
Small black or dark colored bumps on the face are called blackheads.
They are not full of dirt. Blackheads are just whiteheads.
'Pimple' is an informal language term for closed or open comedones.
This term refers to an ongoing skin condition.
It is much more severe, persistent, and often more painful than an occasional pimple.