Tangerine red is used clinically as a decoction in water or as a tea, and can be used to treat cough with excessive phlegm and dietary stagnation. Tangerine red belongs to a kind of traditional Chinese medicine, which is clinically selected mainly from the dried outer fruit peel of tangerine and its cultivated varieties in the family of Rutaceae. Tangerine red can regulate qi and relax the middle (regulating the qi of the spleen and stomach), drying dampness and resolving phlegm (removing phlegm from the body by drying dampness). It can not only treat symptoms such as coughing, coughing with a heavy sound, coughing up phlegm, clear white phlegm, chest tightness and asthma caused by phlegm-dampness obstruction of the lungs, but also symptoms such as reduced eating, indigestion, abdominal distension, nausea and vomiting caused by dietary stagnation. Tangerine red is usually decocted with water and taken internally or as a tea substitute when in use. The adverse effects and contraindications of this medicine are unclear, and it is recommended to consult a doctor before use.