Rejection or migration can happen with any piercing. Basically what happens is your body recognises the piercing as a foreign object and considers that object a threat to your health. At this point, your body actually pushes the piercing to the surface of the skin. This is most commonly found in piercings that are preformed with jewellery that is not suitable for the placement of the piercing, but in some cases can happen for no known reason at all!
Posted by Erynn Lawrence