If you touch your arm lightly with mercury, it is not a big problem, but if the mercury touches your arm in a large amount and also leaves a break in your arm, you must go to the hospital to deal with it, otherwise it will lead to mercury poisoning. If the hand gently touched the mercury will not cause serious poisoning, but with a large amount of hand contact with mercury, you need to immediately go outdoors to air dry that is, through the air to blow the hand mercury dry, let it try to volatilize and release, and then to the hospital with alcohol first three times to wipe, with iodine volts and then a step wipe finished, if the hand has a wound, you should also use hydrogen peroxide to wash the wound, the later natural air dry can be.