what causes acne?

Answer 1

Hormones.
Natural oil and dirt that clogs your pores.
In the shower just wash your face as the steam opens them up

:)

Answer 2

he exact cause of acne is unknown, but doctors believe it results from several related factors. One important factor is rising hormone levels. These hormones, called androgens (male sex hormones), increase in both boys and girls during puberty and can cause the sebaceous glands to enlarge and make more sebum. Another factor is heredity or genetics. Researchers believe that the tendency to develop acne can be inherited from parents. For example, studies have shown that many school-age boys with acne have a family history of the disorder.
Factors That Can Contribute to Acne or Make It Worse
Several factors can contribute to the cause of acne or make it worse. Changing hormone levels in girls and women may cause a flare in their acne 2 to 7 days before their menstrual period starts.Hormonal changes related to pregnancy or starting or stopping birth control pills can also cause acne. Stress, particularly severe or prolonged emotional tension, may aggravate the disorder.

In addition, certain drugs, including androgens, lithium, and barbiturates, are known to cause acne. Greasy cosmetics may alter the cells of the follicles and make them stick together. Friction caused by leaning on or rubbing the skin or the pressure from bike helmets, backpacks, or tight collars can contribute to or worsen acne. Also, environmental irritants (such as pollution and high humidity), squeezing or picking at blemishes, and hard scrubbing of the skin can make acne worse.
Myths About the Causes of Acne
There are many myths about what causes acne. Chocolate and greasy foods are often blamed, but research has shown that foods seem to have little effect on the development and course of acne in most people. Another common myth is that dirty skin causes acne; however, blackheads and other acne lesions are not caused by di

Answer 3

IT IS ALL IN HERE! :

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


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

Answer 4

oil, dirt, and hormones your body isnt used to yet. this is normal for teens, and should clear up on its own by the time thye reach 20. however, some adults have acne well into their 30's and if this is the case you should try proactiv or something

Answer 5

What you eat, or sometimes if your parents used to have acne, it will more than likely pass onto you. Genes...

Answer 6

Bacteria called Propionibacterium acnes. keep your face washen and free from open sores, and keep your bed clothes clean and you'll be okay.

Answer 7

hormones, stress