Tablets and smartphones have become some of the most prized possessions in life for a number of individuals, but it’s easy to believe that these devices are harmless, despite the exposure to metal, glass, and radiation rays. According to a new medical story, this assumption may become outdated soon.

An 11-year-old San Diego boy had a rash that seemed resistant to creams, ointments, and medication for months became a participant in a study to find the cause of his rash. Doctors finally stumbled upon the reason behind the boy’s rash: the nickel ingredient in his iPad.

Once the boy’s iPad was placed into a protective case, his nickel rash improved – a sign that his nickel allergy was caused by daily exposure to his iPad. According to the boy’s mother, the 11-year-old used his iPad daily without a case.

The 11-year-old’s discovery isn’t the only one that seems to confirm the iPad’s nickel ingredient as a source of the rash within the medical community. California MD Dr. Mohiba Tareen says that one of her own medical team members places an iPad on her arm throughout the day. Little rashes appear by the end of the day, and the team members notice them on the affected team member.

Nickel allergies once affected only 10% of the adult population a decade ago, but nickel allergies have now become a plight of children as young as 8 years old. The reason? The iPad, first released in 2010, has become a favorite “toy” of children, as parents find ways to entertain their children without constant supervision. While 15% of adults now manifest nickel allergies, a whopping 20-25% of children manifest nickel allergies – all due to the iPad’s ever-growing child fan base.

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While every itch and rash can’t be attributed to the iPad, Dr. Mohiba Tareen says that you’ll notice itching and red bumps on the skin if you’ve got a nickel allergy. It’s likely that the best way to determine whether or not you’re affected is to get some sort of medical test performed at your local doctor’s office. An Apple spokesman has said that the nickel allergy case is rare, but the 11-year-old’s iPad dates back to 2010.

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Once you have been exposed to nickel and turn allergic to it, it’ll never go away. At this point, the best advice that can be given is to limit your skin contact time with your iPad and place it in a protective case when watching movies, listening to music, and so on. If you get a rash that’s stubborn and won’t go away, however, make your way to a doctor as soon as possible.