the liver will use the sinuses as a secondary path of elimination - the bowels are the main path, and some of the toxins the liver breaks down end up in the kidneys. But there is a link between the sinuses and liver. For instance, sniffing black pepper or looking directly at the sun will cause us to sneeze. This is because it heats up the liver and causes it to cleanse quickly, and that kind of cleansing which involves mucus rather than bile, is best done via the sinuses. If it's constantly using the sinuses they will get backed up into the ear canals. So people who get a lot of ear infefctions need to step up their liver and bowel management.