Submerged Yang Sealing Marrow Elixir can treat gastritis, but it can only treat the solitary Yang upward floating type of gastritis. Gastritis is caused by cold attack, liver qi transverse violation of the stomach (liver qi is not smooth so that it violates the function of the stomach), accumulation of food, gastric yin insufficiency (insufficient yin fluid in the stomach), dampness-heat obstruction (dampness and heat evils gather to form a stagnant blockage), spleen-stomach deficiency (spleen and stomach weakness and cold), etc., with pain in the upper abdomen, abdominal distension, belching (hiccups), regurgitation of acid, nausea, etc., as the main clinical manifestations. Submerged Yang Seal Marrow Dan has the effects of lowering heart fire, nourishing kidney water and clearing heat. It consists of the medicines sand nuts, licorice, cypress and tortoise board. Among them, Radix et Rhizoma Glycyrrhizae enters the spleen and stomach meridians, which has the function of transforming dampness and opening up the stomach (normalizing gastrointestinal function by removing dampness), and strengthening the spleen and stomach; Cortex Phellodendron and Tortoise Plate are used together to restrain yin and submerge yang, which can enter the kidney meridian to clear kidney fire, and enter the spleen meridian to remove dampness and heat, and regulate water and fire; Radix et Rhizoma Glycyrrhizae not only can generate qi in the spleen and stomach, but also can regulate the medicines (regulate the properties of different herbs). Therefore, Submerged Yang and Sealed Marrow Elixir can treat isolated Yang upward floating type of gastritis. The treatment of gastritis must pay attention to the identification of evidence, it is recommended to seek professional medical help, not unauthorized use of medication, in order to avoid adverse consequences.