Why does my abdomen still feel compressed once I remove my compression garment/waist trainer?

why does my abdomen still feel compressed once i remove my compression garment/waist trainer? what does a compression garment/waist trainer do to the body? does it reshape the area that is being compressed? if you wear your compression garment/waist trainer while eating (and the abdomen is being compressed) how does that affect the digestion process? as the body is being compressed, where does the remaining fat, fluid etc, go?

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