Dehumidifying and expelling wind is one of the methods of dehumidification and expelling wind. It is a method to treat the symptoms of wandering pain when the evil of rheumatism stays in meridians, muscles, joints and other parts. Notopterygii Rhizoma, Radix Angelicae Pubescentis, Radix Saposhnikoviae, Radix Gentianae Macrophyllae, Radix Clematidis, Ramulus Mori and Cortex Acanthopanacis are commonly used. Most patients with skin eczema and allergic dermatitis are caused by temperament intolerance, internal damp heat, exogenous common cold and skin immersion. Due to wind-induced drainage of sinuses, dampness and viscosity, and heat are easy to hurt yang and body fluid, resulting in malnutrition and itching of blood-dried skin. Promoting diuresis: the downward trend of medicinal properties can smooth urination, increase urine volume and promote the excretion of dampness evil in the body, so it is beneficial to the role of water infiltration. Some drugs are cold in nature, and they also have the functions of clearing away heat and promoting diuresis, stopping diarrhea and dysentery, stopping leukorrhagia, promoting gallbladder and relieving jaundice, relieving stranguria and relieving pain, and promoting diuresis and removing stones. Some drugs have the functions of strengthening spleen and stopping diarrhea, promoting stagnation and promoting lactation, clearing heat and expelling arthralgia. Eliminating dampness "invigorating the spleen and eliminating dampness"-spleen governs the transport and transformation, and likes dryness and hates dampness. If it is trapped by dampness, the transport and transformation will be abnormal, which is manifested as loose stool, full belly, no appetite, and sour taste. Its pathogenesis is dampness and evil, so spleen should be strengthened and dampness should be eliminated. When the spleen is deficient in dampness, the spleen should be strengthened to remove dampness, and the excess water should be excreted (diuresis) or the substances that cause the body's immune response should be reduced and removed, and warming the spleen and stomach is the best way to relieve dampness.