Phlegm due to the gathering of dampness, dampness from the spleen, phlegm and easy to block the qi, no matter wet phlegm or dry phlegm, can be equipped with qi and phlegm medicines, this is the general rule of expectorant compounding, but the tangerine red warm and dry, more suitable for wet phlegm disease; used for dry phlegm, the dosage is quite light, shellfish and gua-piper loose less than tangerine red in the shellfish, Gua-piper, pollen, and other cold medicines, it can be removed from the nature of the stock, and can help the spleen's transportation and transportation, so that the transmission of fluids and moistening of lungs and dryness.