...Well, there are several reasons. First, it is hard to pin point what causes acne. There are many possible factors that can lead to the condition. Second, different people respond to different treatments. You may have the exactly the same condition as your friend but that does not mean both of you will respond equally well to the same treatment. ...»
Read More: acne-types.blogspot.com
«...It is still unknown how acne forms into the different acne types. What science can tell us right now is that when the sebaceous glands produce excess sebum (oil), it can mix with the dead skin cells and dirt in the skin. This mixture becomes a breeding ground for bacteria. The dead skin cells, dirt and sebum clog up the skin pores. They the manifest themselves as reddish blemish on the skin surface, and this is what we know as acne....»
Full Text: http://best-acne-remedies.blogspot.com
tags: how to get rid of acne, still getting acne in my thirties, sulfur acne treatments for pregnancy