Write the following verse on a blank piece of paper, make into a Taweez and tie on the navel.
بِسْمِ اللَّهِ الرَّحْمَٰنِ الرَّحِيمِ ذلك تخفيف من ربكم و رحمة
Insha Allah the Navel will move back into place. (A’amaal e Quraani)
This same Amal can be used for an inflamed liver or spleen. However, in this case, one will tie the Taweez around the liver or spleen.