What is the state of tongue body?

: Observe whether the tongue is skewed, tremulous and stiff.

Tremor: The tongue will tremble involuntarily, belonging to many genera.

Deficiency of both qi and blood

or

Internal movement of liver wind

Skew: Most of the tongue leans to one side

Stroke hemiplegia

or

Apoplexy omen

Weakness: weakness of tongue extension, mostly caused by deficiency of both qi and blood and dystrophy of tendons and veins.

Toughness: the tongue is stiff, inflexible in flexion and extension, and even unable to rotate, mostly due to high fever.

Body fluid injury

Pathogenic heat

Intense, or a sign of a stroke.