Duk Wu Parasite Soup is an expectorant of dampness. The formula consists of Duk Wu, Morus alba, Cortex Eucommiae, Cortex Pinnatifida, Cortex Pinnatifidae, Cortex Poriae, Cinnamon Heart, Fenghuang, Rhizoma Ligustici Chuanxiong, Radix Panax Ginseng, Radix Glycyrrhiza Glutinosa, Radix Angelicae Sinensis, Radix Paeoniae Alba, and Rhizoma Dioscoreae. In this formula, Duhuo dispels wind and dampness (removing wind and dampness from the body), relieves pain through paralysis (relieving pain by unblocking paralysis of the limbs), and is an important medicine for treating rheumatism and paralysis, especially for treating cold and dampness of the lower limbs and pain in the joints of the lower back and knees; Sanghuosheng dispels wind and dampness, strengthens the tendons and bones, and nourishes the liver and kidneys; Fenghuang, Radix Macrophyllae dispels wind and dampness; Eucommia bark, Cortex cinnamomi, Cortex cuscutae, and strengthens the tendons and bones. Cinnamomum cassiaeum and Sinapis paniculatae disperses cold and relieves pain (relieving pain by removing cold from the body); Rhizoma Ligustici Chuanxiong, Radix Angelicae Sinensis, Radix Paeoniae Alba, Radix Rehmanniae Praeparatae, and so on nourish and invigorate the Blood, and moisten the tendons. The above herbs work together to dispel wind-dampness, relieve paralysis and pain, benefit qi and blood, and tonify the liver and kidney. It can treat wind-cold-dampness paralysis (paralysis of limbs caused by wind, cold and dampness), cold pain in waist and knees, poor flexion and extension of limb joints, impotence and numbness. The adverse effects of this formula are not clear, pregnant women should be cautious. It is contraindicated in cases of paralysis with damp-heat syndrome (symptoms of redness and swelling of muscles or joints, burning heat, severe pain, inaccessibility to touch, accompanied by systemic symptoms such as fever, thirst, irritability, etc.). Patients with discomfort are advised to consult a doctor in time to avoid delay.