The preservation time of boiled herbs depends on the type of packaging, the ambient temperature and the composition of the herbs. A substitute decoction can be kept for a week, and your own decoction can be kept for three days if it does not see air. If the boiled herbal medicine is packed in an airtight vacuum bag, the preservation time of herbal medicine is usually no more than one week in the season of high temperature; if it can be stored in the refrigerator and refrigerated at 0-5℃, the preservation time is usually in January, and it is recommended to try to take it within 7 days; if the boiled herbal medicine is held in the container provided by the patient himself, it is recommended not to take it overnight, and if you want to continue taking it the next day, it is recommended to put it in the refrigerator If you want to continue to take it on the next day, it is recommended to put it in the refrigerator and keep it in the freezer for no more than 3 days. If the ingredients of Chinese medicine contain more starch, protein, sugar, etc., they usually deteriorate more easily and the storage time is shortened accordingly. Boiled Chinese medicine should be kept out of direct sunlight to prevent deterioration. If the Chinese medicine deteriorates, it will not only affect the therapeutic effect, but also may be harmful to health.