Anywhere on the body you want. To our knowledge, other than possible cleansing/detoxing reactions there has been nothing to suggest any negative effects of any kind from using the Zapper anywhere on the body. Only those with heart pacemakers or those who are pregnant should not avoid use of a zapper.
The Terminator is the sole exception that we are aware of and may cause some burning on the skin with very acidic conditions. Always be careful with it in the beginning when using it for extended periods of hours at a time.
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