Before decoction, soak the medicine in cold water for about 1 hour, which is conducive to the precipitation of the active ingredients of the medicine. Use a casserole as much as possible for decoction, or a metal container. After adding water, the medicine floating on the water surface should be turned up and down with chopsticks, so that the traditional Chinese medicine is completely immersed in the water, and the water surface should be 2-3cm higher than the traditional Chinese medicine. The decoction is usually boiled with high heat, and then simmered. Generally, each dose should be decocted three times. , the first frying time is 30 minutes after the pot is boiled, the second time should use less boiling water than the first time, the frying time is 40 minutes after the pot is boiled, and the third time is the same as the second time. Take 150-200 ml of concoction three times, mix well, and take it half an hour after meals every day. There are also some medicines that need special decoction: such as turtle shell, turtle shell, etc. should be decocted for one hour first, and then decocted with the rest of the drugs. There are some medicines that need to be taken, such as Panax notoginseng powder, American ginseng and so on. Swallowed, melted and served as donkey-hide gelatin, antler glue, turtle shell glue, etc. Put the fried concoction back into the pot and heat it, pour the gelatinous medicine to be melted into the concoction, and heat it to melt it. You can also put 2-3 pairs of traditional Chinese medicine together in a pot and fry, and then take it in 2-3 days. This method is only suitable for use in winter or patients with refrigerators.