allergic dermatitis due to contact with, or in some cases ingestion of, nickel or other metals containing nickel (for example, stainless steel).
an allergic contact dermatitis caused by the metal nickel. Exposure comes usually from jewelry, wristwatches, metal clasps, and coins. Sweating increases the degree of rash. Treatment includes avoidance of exposure to nickel and reduction of perspiration. See also contact dermatitis.