Salient. Newspaper of the Victoria University Students' Association. Vol 42 No. 13. June 11 1979
How do they Happen?
How do they Happen?
Usually blackheads appear first - caused by over-productive oil glands, which block up the ducts with a secretion which becomes waxy and then turns dark through surface exposure to the air. Thus you can see that the blackness of blackheads is not dirt.
As your oil glands continue to produce sebum a pimple is formed. If this becomes infected with bacteria on your skin a thing called a pustle forms. This is a bad pimple.
If these are not properly treated scarring is caused by actual destruction of skin tissue.