Plankton under the heart also belongs to a kind of plumpness, which means that the patient consciously feels plumpness under the heart, which is similar to stuffiness and fullness, and the main symptom of plumpness is invisible to touch, soft to press, and painless to press. When subcardiac fullness is the main symptom, it may be caused by the mixture of cold and heat, and the main symptoms are subcardiac fullness, dullness, occasional malaise, belching, bowel sounds and discharging, pale tongue, greasy moss, and moist and slippery pulse. The treatment of cold-heat mixed subcardiac plumpness should be pungent and bitter, and cold-heat should be balanced, and the commonly used representative formula is Half-summer Diarrhea Heart Soup, which consists of Half-summer, Scutellariae Radix, Dried Ginger, Radix Panax Ginseng, Rhizoma Glycyrrhizae Praeparatae, Scorched Licorice, and Jujube. If the patient has obvious nausea and vomiting, ginger, bamboo rhizome and suspension flower can be added; if the patient has dullness and does not want to eat, ji nei jin, grain buds and malt buds can be added; if noisy and uncomfortable is the main manifestation, zuo jin wan can be used together.