Pretty much all people are attached to their phones these days, but it turns out yours might give you a rash. NYC-based dermatologist Nava Greenfield says metals in your phone like nickel and cobalt can cause an allergic reaction. Also, if you have a rubber phone case it could cause skin irritation as well; and your phone could give you zits, as it blocks your pores when you hold it up to your face to make a call. In addition, there's a chance the light and infrared energy from your phone could cause hyperpigmentation, or dark spots, on your skin.
(Women's Health)