Hi my husband has LOTS of problems but the one that concerns me is the lump on his back between his shoulder blade. It use to come and go so I put some pull sauve on it the smell is gross it come out a little at a time and then it stops there is a small black dot on top but. He had that for about 20 years if its not one place it comes out another place. Its like it follows a canal from the shoulder blade down the spine to the bottom. please let me know what you think this could be. Best regards DS