“Stick out your tongue, please.” We are really into tongues as a way to see what is happening with the internal organ functions. Some people are into pulses, some are into tongues, some are into both and not many are into neither. this is what your tongue may look like if you need Gui Pi Tang. Pale-“ish”, maybe a slight, slight coating. Your tongue may look like this is you need Yue Ju Wan (although this one is a little extreme). Thick yellow coating, red or purplish tongue body.