The 2nd addition of water when boiling herbs is usually cold water added. Patients need to note that whether the 1st or 2nd addition, and whether cold or hot water is added, the effect on the medicinal effect is less, and if they are really unsure they can consult the prescribing doctor in detail and then boil. In addition, for boiling Chinese herbal medicine, the aspect that needs attention is not focused on the temperature of adding water, but for different textures of Chinese herbal medicine, the amount of water added and the boiling time have certain requirements respectively: I. Amount of water: data show that there is a general formula for the amount of water used for boiling Chinese herbal medicine, such as the amount of water for boiling Chinese herbal medicine for the 1st time = total amount of medicine (g) + dosage + 150ml, while the amount of water for boiling Chinese herbal medicine for the 2nd time = dosage + 200ml. 200ml. 1. For general Chinese medicine, choose water in the conventional state, provided that there are no other stains in the water, and the amount of water used is generally best controlled at 2-3cm above the drug; 2. For drugs with loose texture and easy volatility, also choose water without impurities, but the amount of water should not exceed 2cm above the most surface of the drug; 3. For drugs with hard texture, choose No impurities in the water, the amount of water is generally more, generally controlled between 3-6cm best. Boiling time: 1. For the type of drugs such as antipyretic, antipyretic and aromatic, the first boiling time is generally controlled at about 15 min, and the second boiling time is generally controlled at about 10 min; 2. For tonic Chinese medicines, the first boiling time is generally controlled at 20-30 min, and the second boiling time is generally controlled at 30 min; 3. For compound medicines, the first boiling In addition, since most Chinese herbal medicines are dried and processed, they basically need to be soaked during boiling in order to increase drug solubility and facilitate the rapid dissolution of active ingredients when heating the medicine to ensure the therapeutic efficacy of the Chinese medicine. Generally, warm water is used to achieve the soaking of Chinese herbs, and the soaking time is generally 20-30min.