Phellodendron Bark is a concoction of Phellodendron Bark, which can clear away heat and dry dampness, reduce rebelliousness and relieve cough, and nourish Yin. Phellodendron Bark can clear away heat and dry dampness, diarrhea, remove steam, detoxify and cure sores. It can be used for damp-heat diarrhea (diarrhea caused by feeling damp-heat evil), jaundice, urinary redness, vaginal itching, feverish drenching (burning and stinging pain during urination, accompanied by urinary frequency and urgency, and discomfort of traction in the abdomen), astringent pain, athlete’s foot, bone vapor (feeling the heat coming from inside the bone to the outside), night sweating (sweating abnormally after going to sleep, and sweating stops after waking up), spermatorrhea, and wet sores of eczema. The bitter and dry nature of Phellodendron Bark is moderate, nourishing yin and lowering fire (nourishing yin essence, lowering fire), retiring the effect of deficiency heat is strong, the main treatment for yin deficiency and fire (deficiency of yin essence in the body, the emergence of hyperactive deficiency fire), bone vapor and night sweating, spermatorrhea, and so on. It is recommended to use the medicine under the guidance of a doctor.