how come some pimple's leave scares on face ?

Answer 1

IT IS ALL IN HERE! :

http://en.wikipedia.org/wiki/Acne_vulgaris

TRUST ME! REALLY GOOD INFO.
IT’S WORTH READING!

Here is what the WEBSITE CONTAINS:

Contents:
1 SYMPTOMS
2 CAUSES OF ACNE
2.1 MISCONCEPTIONS ABOUT CAUSES
3 TREATMENTS
3.1 TIMELINE OF ACNE TREATMENT
3.2 AVAILABLE TREATMENTS
3.2.1 Exfoliating the skin
3.2.2 Topical Bactericidals
3.2.3 Topical antibiotics
3.2.4 Oral antibiotics
3.2.5 Hormonal treatments
3.2.6 External retinoids
3.2.7 Oral retinoids
3.2.8 Phototherapy
3.2.8.1 Blue and red light
3.2.8.2 Photodynamic therapy
3.3 Less widely used treatments
3.4 FUTURE TREATMENTS
3.5 Preferred treatments by types of acne vulgaris
4 ACNE SCARS
5 See also
6 References
7 Footnotes
8 External links



2ND USEFUL WEBSITE:

http://www.humanillnesses.com/original/A-As/Acne.html

IF YOU WANT TO KNOW:

What Is Acne?
What Kinds of Acne Are There?
Who Gets Acne?
What Else Causes Acne?
What Does Acne Look Like?
How Is Acne Treated?
What Doesn't Cause Acne?

Web contains a testimony: Johnny's Story
Also, web provides ACNE SCAR TREATMENTS


I’ve got more than 40% BEST ANSWER

Answer 2

Mostly cause folks pick at them

Answer 3

Because they get infected.