Every disease has some agent that causes inflammation. As already mentioned, not all inflammation is bad. Acute inflammation helps the body eliminate the agent

Every disease has some agent that causes inflammation. As already mentioned, not all inflammation is bad. Acute inflammation helps the body eliminate the agent and thus heal. When you're talking about inflammation that underlies all sickness, you're talking about chronic inflammation. This occurs when inflammation doesn't subside which leads to your body attacking itself. This is such an interesting topic. I've actually just written an article about leading diseases that are caused by inflammation, if you're interested: https://www.iamliesa.com/inflammatory-diseases-inflammation https://www.iamliesa.com/inflammatory-diseases-inflammation