Different parts of the top and underneath the tongue represent different parts of the body.It’s not as detailed as the eyes, but is used as a secondary modality to identify deficiencies.

For example, the middle of the tongue represents the spine and small intestine, while the underside shows hormones, fatty deposits in the blood, etc. The cracks, texture, color and indentations on the tongue are also analyzed. The tongue is an excellent tool to identify weaknesses that were not yet present, or were overlooked, in the eyes.