Low tongue coating may be caused by a deficiency of spleen and stomach qi and damage to stomach yin, and untimely treatment will lead to the danger of further impairment of spleen and stomach function. Tongue coating is a layer of moss spread on the tongue, Chinese medicine believes that the tongue coating is formed by the stomach qi, and low tongue coating indicates that the spleen and stomach function is weak. 1. Patients with low tongue coating due to deficiency of spleen and stomach qi may clinically manifest with loss of appetite, unappetizing food, tiredness and fatigue, and loose stools, etc. In the clinic, you can choose the products that are beneficial to qi and healthy to stomach. Clinically, we can choose medicines with the function of benefiting qi and strengthening the spleen (regulating the qi of the spleen and stomach), such as Ginseng Ling Bai Zhu San and Si Jun Zi Tang. 2. For patients with low tongue coating due to damage of stomach yin, clinically they may have dry mouth and bitter taste, heartburn and acid reflux, anorexia, nausea and vomiting, dry stools and reddish tongue, etc. Medicines with the function of nourishing stomach yin, such as Maimendong Soup, can be chosen to treat these patients. Low tongue coating mainly reflects the impaired function of the spleen and stomach, which may be aggravated if left untreated. It is recommended that patients with low tongue coating should go to a regular hospital in time and be treated under the guidance of a professional physician.