Fake Nails
Some people have really bad allergic reactions to the resin found in acrylic nails. The reaction can cause redness, swelling and can even cause your nail to fall off! Ouch!
Nickels
Nickels are bad news for about 15% of Americans with an allergy from nickel. They can experience skin irritation and rashes from merely handling the currency. Seems like a good reason to use a credit card, right? On a more serious note, those with the allergy have to be very careful because nickel is present in jewelry, glasses, zippers, cell phones and even some kinds of legumes!