The Efficacy and Functions of Tangerine Peel (Chen Pi), and Its Contraindications

Tangerine peel (Chenpi) has a pungent and bitter taste, is warm in nature, and is associated with the lung and liver meridians. It can regulate qi to relieve pain, harmonize the middle jiao and stimulate the appetite, and has significant therapeutic effects on symptoms such as vomiting and hiccups caused by disharmony of the spleen and stomach. It functions to regulate qi and strengthen the spleen, and to dry dampness and resolve phlegm. Tangerine peel is commonly used to treat symptoms such as qi stagnation of the spleen and stomach, abdominal distension and fullness, poor appetite, cough with excessive phlegm, and other related conditions. Its qi-regulating effect helps promote digestion and relieve gastrointestinal discomfort; its ability to dry dampness and resolve phlegm benefits the improvement of respiratory symptoms. However, tangerine peel is not suitable for everyone. It is contraindicated for individuals with excessive internal heat (real-fire syndrome), as tangerine peel is a warming herb that may exacerbate internal heat. Such individuals should avoid its use. Pregnant and lactating women should use it cautiously and only under the guidance of a physician. It is also contraindicated for individuals with yin deficiency and dry cough, as tangerine peel may consume body fluids and worsen lung dryness and injury to body fluids, thereby aggravating symptoms of yin deficiency and dry cough. Individuals with known hypersensitivity to tangerine peel should avoid its use to prevent allergic reactions. Additionally, tangerine peel should not be taken concurrently with certain herbs such as Banxia (Pinellia ternata) and Guallu (Trichosanthes kirilowii), to avoid adverse interactions.