Oxalis foot soak can have the benefit of clearing heat and dampness and cooling the blood, but it does not guarantee a specific therapeutic effect. Oxalis is the dried whole grass of the graminaceous plant oxalis, sweet in flavor and cool in nature, and can be used clinically to treat summer fever, gonorrhea (increased urination, drenching and astringent pain), jaundice, dysuria (unruly urination), and bruises and other conditions. In daily life, soaking feet with it may have the benefit of clearing heat and inducing dampness, and is suitable for patients with internal dampness-heat. However, this drug is used by decocting with water for internal use or taking juice from the fresh product, and its effective intake cannot be guaranteed when soaking the feet, so its specific therapeutic effect cannot be clarified. The adverse reactions and contraindications of this drug are not clear, patients who need to use it as a drug should be under the guidance of a doctor, not unauthorized use of drugs.