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Do tattoos cause cancer? Tattoos have become increasingly popular in the United States in recent years, but along with that comes a rise in problems such as allergic reactions and infections, an expert says.

More than one-third of Americans aged 18 to 25 report getting a tattoo, according to the Pew Research Center. But if you’re thinking about getting “inked,” there are some things to consider before you head to the tattoo parlor.

“Since tattoos are not regulated in any way, there are many unknowns that could pose potential problems for consumers in terms of the inks and tools used,” Dr. Michi Shinohara, a clinical assistant professor of dermatology at the University of Washington in Seattle, said in an American Academy of Dermatology news release.

“It is especially important for consumers to be aware of the potential risks, report any problem that develops to the tattoo artist and see a board-certified dermatologist for proper diagnosis and treatment,” Shinohara added.

Tattooing inks have changed a great deal over the years and many modern tattoo inks contain organic azo dyes with plastic-based pigments that are also used industrially in printing, textiles and car paint. Many unknowns exist about how these new tattoo inks interact with the skin and within the body.

Allergic reaction to the tattoo pigments is one of the most common problems associated with tattooing. Infections also can pose a serious threat to health. Along with localized bacterial infections, there have been reports of people being infected with syphilis and hepatitis B and C due to non-sterile tattooing practices, Shinohara said.

Read more about the link between tattoos and cancer at BlackDoctor.Org.

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