Discussion: Diagnosis using tongue color and texture is simplistic but straightforward for many chronic patients.

Your tongue mirrors the condition of the internal organs. You'd be surprised, but this is a very accurate tool still used today in traditional Chinese medicine. Diagnosing using the tongue is relatively easy. You will find videos and precise explanations. The desired color of the tongue for its entire length is pink-red, without membranes, bumps, or uneven texture in light colors.

Link: Chinese Medicine: Cupping, Scraping, Ginger therapy, and medicinal Leeches.
https://www.sf-healing.com/page/137 (Copy & Paste)