Re: What are pimples made of?

Yan Ho:  Pimples are infections, usually caused by some type of bacteria.  
They reproduce, make waste products and die so that they make a small mound 
in the epidermis of the skin.  If the pus ( a combination of dead bacteria 
and white blood cells that are "fighting" the bacteria ) shows through the 
skin, then we call it a "white head".  If dirt is accumulated in the pimple 
area, we call it a "black head".  I hope this answer helps.  J. Bridger