In London, physicians are figuring out unexplained rashes on people’s ears and cheeks. According to the British Association of Dermatologists (BDA), these are skin allergies caused by excessive mobile phone usage.

Citing from new findings from their studies, the BDA called these allergies “mobile phone dermatitis.” Essentially, it’s an allergic reaction to nickel surfaces, which are commonly placed on cell phones, after prolonged hours of contact.

As of late, safety concerns for mobile phone usage have grown—as it has become man’s primary means for communication. But these devices are cleared by medical boards across the globe for serious diseases, like cancer.

The BDA said in a statement, “In mobile phone dermatitis, the rash would typically occur on the cheek or ear, depending on where the metal part of the phone comes into contact with the skin. In theory it could even occur on the fingers if you spend a lot of time texting on metal menu buttons.” 

Before the group’s findings, most doctors were unaware that the rashes were connected to the use of mobile phones.