A nickel allergy will trigger contact dermatitis – the same kind of skin reaction that happens when you brush poison ivy or get stung by a bee. 3 signs to look out for: Inflamed skin: This can include raised bumps and blemishes. Swelling/Itching: If ears look swollen or feel sore and/or itchy. Redness: A rash can be a telltale sign, especially a painful one. |