How do you know if your navel piercing is migrating?

Generally rejection starts when you notice the tissue between the entry and exit points going from a normal flesh tone to a more pinkish tone. This can be due to jewellery that is ill fitting (generally too large or long for the piercing) causing stress on the actual tissue retaining the piercing. If you notice this tonal change in the skin, that's the time you should ask yourself if you want to keep the piercing or not. If you opt to loose the piercing or have it redone then remove the jewellery from the piercing and see your local professional body piercer for a second opinion. Sometimes changing the jewellery can revert a migration by minimizing the irritation longer or over sized jewellery can cause.