Cracks in the middle of the tongue moss are usually due to deficiency of Yin essence or heat injury to Ying-Yin, resulting in cracks in the middle of the tongue moss or less moss. For Qi and Blood deficiency and Ying-Yin deficiency, this physique will generally have weakness, tiredness, Qi and Blood deficiency, and will have insomnia, dreaminess, usually reduced concentration, poor memory, poor appetite or loose stools, and red tongue and dry mouth. With a cracked tongue, one should benefit Qi and nourish Blood. Usually pay attention to the intake of foods that benefit Qi and nourish Yin such as Wolfberry, Wu Wei Zi, Mai Dong and Asparagus, and usually pay attention to reducing the consumption of Qi and Blood. If for damp-heat injury to Ying-Yin, on top of a cracked tongue, you may also see a red tongue with yellow moss, indicating that damp-heat is inside and injures Ying-Yin, so you need to pay attention to clearing damp-heat. This condition may result in sticky and unpleasant stools, damp-heat downward injection, increased dribbling and increased discharge in women, and damp-heat in the liver and gallbladder will result in bitterness in the mouth, swelling and pain in both sides, and irritability and impatience. To clear damp-heat in the spleen and stomach, there is Ge Gen Scutellaria Tang, and to clear damp-heat in the liver and gallbladder, generally use Gentian Diarrhea Liver Tang. However, it is important not to overdo it when clearing the heat, as overdoing it can lead to additional symptoms.