Whiteheads – Pimples that form in clogged pores and remain under the skin
Blackheads – Pimples that form in clogged pores and appear on the surface as black spots
Cysts – Painful pus-filled lumps that appear on the surface of the skin.
Nodules – Painful lumps that occur deep in the skin and appear as large pimples on the surface of the skin.