Coldness in the mouth may be related to insufficient qi and blood, deficiency of spleen and stomach (spleen and stomach weak and cold), etc. It can be regulated by taking proprietary Chinese medicines such as Yiqi Nourishing Blood Oral Liquid and Compound Colla Corii Asini Syrup. 1. Yiqi Nourishing Blood Oral Liquid is a proprietary Chinese medicine. It has the effect of benefiting qi and nourishing blood (replenishing the body’s qi and blood), and is used for shortness of breath and palpitation (rapid heartbeat, often accompanied by panic), lack of color, and weakness due to insufficient qi and blood. 2. Compound Colla Corii Asini Syrup, Chinese patent medicine. It is composed of Colla Corii Asini, Red Ginseng, Radix Rehmanniae Praeparata, Radix et Rhizoma Ginseng, Radix et Rhizoma Ginseng, and Hawthorn. It has the effect of tonifying qi and nourishing blood (tonifying qi while nourishing blood). It is used for Qi and Blood deficiency (deficiency of both Qi and Blood), dizziness, palpitation and insomnia, loss of appetite and anemia. Note: It is forbidden for those who are allergic to the ingredients of Yiqi Nourishing Blood Oral Liquid and Compound Colla Corii Asini Syrup, and need to use proprietary Chinese medicines under the guidance of a Chinese medicine practitioner for identification of symptoms, and should not be taken on their own.