The status of a normal tongue is as follows: it has medium size, moderate thickness, proper moisture, and a light white coating like fog, without pits and bumps. It can also move around freely.
BSM tongue-reading pays more attention to the following tongue conditions: the height of the tip, the bumps on the middle part, the moisture of the tongue, the stickiness of the root, and the width of the tongue. These are basic and essential for a correct diagnosis, because they indicate the matter and energy distribution in the whole body.
It is better to observe the tongue during daytime, under full and soft natural light. Using a flashlight should be avoided, because it usually hides the realities of the tongue.