A popular beauty treatment can cause STI's

A whopping number of people still use tanning beds despite the fact that they’re known to cause skin cancer.

In fact, about one in three U.S. adults say they’ve used a tanning bed before, according to 2014 data.

But if the prospect of melanoma isn’t enough to turn you off indoor tanning, maybe this will: You could risk getting an infection.

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Dermatologist Dawn Marie Davis, MD, an associate professor of dermatology and pediatrics at the Mayo Clinic, tells Yahoo Health that bacteria and virus' can survive in tanning beds, despite the heat.

“We all have bacteria on the skin, which you’ve transferred to the bed. Then it’s being heated, but not so much to kill [the bacteria], then it becomes stronger and hardier,” Davis says.

“If you sweat, that only adds to the bacteria or virus’ ability to grow, and then if you have a nick or cut in your skin, which is very common, then you’re much more likely to acquire the infection.”

Davis says staphylococcus bacteria (which can cause skin infections), fecal bacteria, the herpes virus, and wart-causing human papillomavirus are able to survive in a tanning bed. “In my practice, I’ve seen acquired bacterial infections, warts, and herpes infections from tanning beds based on the timing of the infection and distribution of the infection,” she says.

Many people think the ultraviolet light is able to kill off any and all germs lurking in the tanning bed. They also assume that all the technicians in a salon thoroughly clean the tanning beds after each use, and that the person who used the tanning bed right before wore clothing, like a swimsuit, while they tanned.

But the truth is, all of these factors aren’t always the case — “and when you put that all together, ultraviolet can theoretically kill germs, but it’s not enough to kill germs on the tanning bed. Bacteria and viruses can grow and replicate on the tanning bed,” Davis says. “What’s interesting is that when you use the ultraviolet light over and over again — and the tanning bed lights are on for multiple hours a day — if the bacteria or virus is exposed to some antiseptic but not enough to kill it, or some light but not enough to kill it, it can grow stronger and then it becomes resistant.”

Obviously, the best way to avoid this problem is to just not indoor tan at all. Davis says she advises her patients to instead get spray tans or use self-tanner to get that desired glow.

Skin cancer and infections aren’t the only risks from indoor tanning. Data from the Centers for Disease Control and Prevention show that tanning beds were the cause of more than 3,000 visits to the hospital each year from 2003 to 2012, due to skin burn injuries, eye injuries (such as burns, inflamed cornea or objects that became embedded in the eye), and loss of consciousness.

- Amanda Chan

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