In autoimmune diseases, the immune system detects the body's own molecules as foreign and triggers inflammation that damages specific tissues.

We analyzed the available evidence and found that in autoimmune diseases, the immune system appears to mistakenly identify the body’s own molecules as foreign, leading to inflammation that targets specific tissues [1]. This process is not a response to infection or injury but rather a misdirected reaction where immune cells and signaling molecules attack healthy parts of the body. The inflammation that follows can disrupt normal tissue function and contribute to symptoms depending on which organs or systems are involved. What we’ve found so far is based on 16 studies or assertions that describe this mechanism, with none contradicting it. The pattern across these reports consistently points to immune confusion as the starting point — where the body’s defense system loses its ability to tell self from non-self. This doesn’t mean the immune system is weak; it means it’s misaligned. The damage isn’t caused by a virus or toxin, but by the body’s own response to what it wrongly sees as a threat. This doesn’t explain why the immune system makes this mistake in the first place — only what happens after it does. We don’t yet have enough evidence to say what triggers this confusion, or why it affects some people and not others. But based on what we’ve reviewed so far, the link between immune misidentification, inflammation, and tissue harm is consistently described across the studies we’ve examined. In everyday terms: your body’s defense system is accidentally turning against itself, and the resulting inflammation is what hurts your tissues.