Skin imperfection are just some red spots, kinda normal ones that most teenagers get. Acne is when the spots get infected and are really

pussy and usually go into your skin.

Answer:
acne consists of pimples and others enjoy it

More info in

http://www.beauticianworld.com/acne.html

and skin imperfection is that what the words express imperfection of skin

Some acne removal methods are

1) Cook oatmeal and apply on face for fifteen minutes and wash.

2) Make a warm bath with blanch of nettle and rosemary.

3) Apply equal amount of lemon juice and rose water with a cotton ball and wash it after haif an hour for 15 to 20 days.

For dozens of more ways, prevention, types and reasons check

http://www.beauticianworld.com/acneremed…

Answer:
Imperfection or flaws, are not limited to acne, they can be wrinkles or crows feet, etc.
Answer:
ClearPores