If the tongue is bright red and mainly red, it is called red tongue; If the tongue is red and dark, it goes further than red, which is called crimson tongue. Before the appearance of crimson tongue, it often goes through the stage of red tongue, and it is often said that red tongue is a symbol of fiery inflammation. The difference between the two is only based on the degree of heat. Red tongue is caused by high fever and yin injury, which often occurs in pathological processes such as infection, poisoning, vitamin deficiency, dehydration, anemia and coma.
Extended data:
How does Chinese medicine diagnose diseases through the color of tongue coating?
Observing the color and coating of tongue is one of the important contents of TCM inspection, and it is also an important objective index for diagnosing diseases.
The tongue is the seedling of the heart, waiting outside the spleen, and the coating is born of stomach qi. Zang-fu organs are connected with tongue through meridians. The difference between hand yin deficiency and foot yin deficiency is the root of tongue, foot yin deficiency is the root of tongue, foot jueyin is the root of tongue, and foot Taiyin is connected with the root of tongue and scattered under the tongue, so viscera diseases can be reflected in tongue quality and tongue coating.
Tongue diagnosis mainly examines the shape, color and dryness of tongue and tongue coating, so as to judge the nature of the disease, the depth of the disease, the rise and fall of qi and blood, the profit and loss of body fluid and the deficiency and excess of viscera. Cao Zhangbing's Guide to Distinguishing Tongue: "Distinguishing the quality of tongue can distinguish the deficiency and excess of viscera, and depending on the coating of tongue, we can observe the depth of six evils."
Tongue diagnosis should combine tongue quality, tongue coating and syndrome differentiation. Generally speaking, the pathological changes reflected by the two are the same, but there are also inconsistencies, which need comprehensive analysis and measurement, and refer to other syndromes to make a correct judgment.
References:
Baidu encyclopedia-Tongue