How it Works

• When pores, filled with trapped oil and dirt, become infected with bacteria, the body reacts by fighting the bacteria and the pore becomes inflamed. The heat from the light, and possible combination with certain anti-bacterial acids, kill the bacteria and dry out the pore. The frequency of light and the use of acid is the subject of some debate.
  
  

Using a Home Light

• Problem skin is exposed to a low-intensity blue light, sometimes combined with red light, for about 15 to 20 minutes. This treatment is repeated three or four times each week. Some treatments include the use of a glycolic or salicylic acid on the infected skin before light exposure.
  
  

Does it Work?

• The United States Food and Drug Administration doesn't require light therapies to undergo the research found with medications. Studies into the effectiveness of light therapy for acne exist, but data is minimal. Most results show an improvement of acne in mild to moderate cases. The Food and Drug Administration has approved the use of narrow-band, high-intensity blue-light therapy in the treatment of acne.
  
  

Cost

• Home light therapy units range in price from around $40 to more than $250. Based upon consumer opinions, the pricier units received the best reviews. Larger lights expose a larger area of the back at a single time. Since treatments require frequent exposure, the large lights, as opposed to the hand-held, make more sense despite the cost.
  
  

Worth the Investment?

• Home light therapy for back acne should be tried after other treatments have failed. Back acne is often caused by tight-fitting clothes and poor cleaning habits. A simple adjustment in hygiene can have dramatic results. Topical acne treatments are also more practical. Still, light therapy, when using a larger unit, may be effective for mild to moderate back acne.