Use pure wormwood without impurities. In summer, you can step on it yourself, dry it, and then hit it 1200 with a mallet until it becomes firm. You can knead it into a ball by hand. There are two ways to use it. One is to put the hair of wormwood on it with edible ginger slices and stick it on the joints (preferably the joints of bones), and the wormwood can be cured once or twice a day.