Condition analysis: Chinese medicine foot bath must be used under the guidance of Chinese medicine, because Chinese medicine foot bath is aimed at people who don't use it, such as tonifying kidney, promoting blood circulation, warming yang or nourishing yin. If you use it wrong, it will be counterproductive. Elderly people with qi deficiency can choose nourishing drugs such as Codonopsis pilosula, Astragalus membranaceus and Atractylodes macrocephala. Patients with hypertension should soak their feet with chrysanthemum, medlar, mulberry branch, salvia miltiorrhiza and borneol. Some elderly people need to promote blood circulation and tonify kidney, such as angelica, red peony root and safflower. Some elderly people have dry skin in winter, so they can choose cassia twig, honeysuckle and safflower. Suggestion: