2. Patients with internal heat, qi deficiency and hemoptysis should also use dried tangerine peel with caution. Because dried tangerine peel is relatively dry, it is not suitable for patients with dry and hot cough. Chenpi has the functions of regulating qi, strengthening spleen, eliminating dampness and resolving phlegm. For patients with excess heat and dry cough, it is best not to soak dried tangerine peel in water.