If your cells are dying unnaturally, if you rupture or annoy a Mast Cell below the skin, or if your immune system is fighting enemies, they release chemicals that cause inflammation. A flood of fluids and all sorts of chemicals, which annoy your enemies, attract reinforcements, and make it easier for them to get into the infected tissue, all of which make it easier to defend a battlefield. But inflammation is hard on the body and in many cases presents a real danger to the health of the body.