The South seeks the North. Based on the simplest laws of physics, the wrong side of the magnet placed over sensitive tissue could cause damage. Remember, South Pole is positive. Positive is stimulating and could stimulate all forms of life including bacteria, viruses, increased inflammation, increased cancer rates, etc. The geological North Pole is negative.
Negative charges create negative energy , the calming healing energy.
For your safety, all biomagnets are triple tested with a measuring instrument known as a magnetometer. Be aware of what kind of biomagnets you're getting before you buy. Wrong pole markings can be harmful to your health. Consider Polarities when Using Biomagnets as a complimentary health care treatment. Green is the universal Biomagnetic color for Negative Polarity.