Causes

Although acne is most often associated with the face, it’s also common to experience breakouts on other parts of the body. But regardless of the location, the causes are typically the same.

• Excess oil. Located in the skin, sebaceous glands produce sebum, an oil-like substance. Under normal circumstances, sebum protects the skin from dehydration, keeping it smooth and supple. The trouble starts when the sebaceous glands start working overtime and produce too much oil, which triggers unwanted breakouts. In larger areas such as the arms and chest, there are more sebaceous glands, increasing your chance for breakouts.
• Clogged pores and bacterial buildup. Excess sebum can also cause dead skin cells to clump together and stick to the inside of pores, plugging the opening and creating the perfect breeding ground for bacteria. The result? Inflammation, whiteheads and blackheads.

Additional triggers

In addition to overactive oil glands, clogged pores and bacterial buildup, other factors can increase your odds of developing acne on the chest and arms (or worsen existing body acne).

• Tight clothing. Pressure, friction and irritation from your clothes can exacerbate existing acne or irritate inflamed skin. So avoid tight clothes that constrict the skin or rub against it.

  Also, keep in mind that some fabrics — especially synthetic fabrics — don’t "breathe" as well as others, preventing the moisture from properly evaporating from the skin. Opt for loose-fitting, breathable clothing that doesn’t constrict or trap moisture next to the skin. Cotton is one of the best fabrics for people prone to body breakouts.

• Damp or sweaty clothes. Whether you power-walk, hit the gym or play team sports, wearing your damp, sweaty clothing after vigorous activity is just asking for trouble: It creates the perfect breeding ground for bacteria.

• Long hair. Unfortunately, your long, luminous locks may be to blame for body acne. According to DermaNetwork, a Web site maintained by dermatologists and plastic surgeons, long hair (past the shoulders) can transfer oil and dirt to the shoulders, back, arms and chest, which can increase the risk for breakouts.

Banish body acne

The good news is that body acne is treatable. Here are several strategies for preventing and treating your breakouts.

• In the shower. For starters, shower as soon as possible after exercise, vigorous activity or sweating. Choose a body wash with salicylic acid to control breakouts and increase cell turnover. Try Peter Thomas Roth Blemish Buffing Beads Body Wash, which contains 1 percent salicylic acid.

• All-over purification. Another great way to control acne is to use a purifying body mask to deep clean the skin. Try AHAVA Pure Spa Energizing Body Mud Mask Mandarin Cedarwood, made with pore-clearing mud and clay, as well as mandarin and cedarwood extracts. Leave it on for five minutes and rinse well.

• On the spot. If all-over acne-fighting cleansers are too harsh or you have a small number of blemishes, use spot treatments. Look for a spot remedy that contains benzoyl peroxide, glycolic acid, salicylic acid or tea tree oil. Consider Jan Marini Benzoyl Peroxide 10%, Dr. Michelle Copeland Blemish Corrector and Intensive Acne Spot Treatment or Murad Clarifying Body Spray.

• Conceal. You can also mask blemishes with makeup. CoverBlend Corrective Leg and Body Makeup is specially formulated to conceal imperfections on the body.

Learn everything you need to know about acne-fighting skincare in our Complete Acne Handbook.