Once someone is sensitized to nickel from an allergic reaction to nickel-containing materials, subsequent contact will have to be avoided as it will continue to produce these effects. Skin reactions such as itching, burning, redness or other rashes are the most common symptoms with nickel sensitivity, however asthma attacks are another, but less frequent possibility in some people. Intestinal absorption of nickel is less than 10%, with the kidneys controlling the retention or elimination of nickel, however most of it is eliminated in feces, some in urine, and a small amount through sweat... Full Text