What’s additional vibrant than a red tongue? An eggplant/purplish hue. Even though purple might be an attractive colour somewhere else in mother nature, say, on a flower, on the tongue, it’s a sign of a significant problem with blood circulation. The Triple Hotter governs Blood Vessels and Arteries. From https://johnathan8e46t.thenerdsblog.com/28994553/indicators-on-chinese-medicine-for-cough-you-should-know