Picture of Nickel Contact Dermatitis from Necklace
Nickel contact dermatitis is an allergic skin reaction that happens when a sensitive person comes into contact with nickel. Snaps on clothing or pajamas, jewelry, belt buckles, and watches are common sources of exposure. Contact with nickel can cause red, itchy lesions in the area of contact.
Text Reference: American College of Allergy, Asthma & Immunology: "Contact Dermatitis"