Image courtesy of Men's Health

Is your smart phone making you itch? Approximately one-third of all Blackberries contain nickel, one of the most common allergens that causes contact dermatitis, according to new data presented at the Annual Scientific Meeting of the American College of Allergy, Asthma, and Immunology (ACAAI).

Researchers analyzed 75 cell phones--including iPhones, Droids, Blackberries, and flip phones--in search of models containing two common allergens, cobalt and nickel. Flip phones contained the most nickel, and when it came down to the smart phones, the Blackberry was the only model to contain one of the suspect substances, says lead study author Tania Mucci, M.D., a member of the ACAAI.

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If your skin's in contact with the metal too long, you could develop an allergy to it, according to the Mayo Clinic. What that looks like: dry, itchy patches of skin along your cheekbones, jaw line, and ears. Worse, if overexposure to an allergen continues to occur, you can develop post-inflammatory hyperpigmentation (a darkening of the skin pigment due to increased amounts of melanin) and scarring, Dr. Mucci says.

There's no cure for a nickel allergy, so your best bet is to eliminate the nickel-contaminated substance that's giving you fits, says Dr. Mucci. Translation: Out with your Blackberry, in with another smart phone. And while you're searching for a new model, grab an oral antihistamine like Allegra to relieve the itching. (Check out our list of The Best Allergy Meds for Men to find the right reliever for you.)

Not sure whether it's an allergic reaction or just dry skin? See your doctor for a patch test, suggests Dr. Mucci. Your doc will place small quantities of potential allergens (including nickel) on your skin, and leave them on for two days to test for a reaction. (Click here to determine when you should see an allergist.)