Fast and visible versus slow and invisible — two very different processes that share one name.
This page is general education, not a diagnosis. If you're dealing with persistent or severe symptoms, please see a doctor — lifestyle tracking can be a useful complement to medical care, never a substitute for it.
Think of a sprained ankle or a cut finger — swelling and redness appear within hours, peak within a day or two, and resolve within days to weeks as healing completes. It's uncomfortable, but it's your immune system doing exactly what it should.
Chronic low-grade inflammation runs at a much lower intensity — you generally can't see or feel it directly — but persists for months or years. It's typically detected indirectly, through blood markers like hs-CRP, or inferred from its associated effects: fatigue, slower recovery, and the various body-system connections covered elsewhere on this site.
Icing a sprained ankle interrupts a useful acute process your body needs to complete healing — appropriate for short-term injury management, not a general anti-inflammatory strategy. Chronic inflammation is the opposite problem: nothing to interrupt, but a background pattern to gradually shift through diet, sleep, alcohol, exercise and stress — THE FAD's actual focus.
If you're dealing with acute pain or swelling from an injury, that's a different situation entirely from what THE FAD tracks — see a doctor for anything beyond routine, minor first aid.