1. Siwutang: Chinese angelica, Ligusticum chuanxiong, Paeonia lactiflora and Radix Rehmanniae in equal proportion, usually 1 grams. Four kinds of medicinal materials are mixed into nearly 4 grams of Siwu decoction;

2. Wash the raw materials with clear water and put them in a casserole. Pour a certain amount of clear water until the water overflows the medicinal materials, and soak for 15 minutes;

3. Cook with medium fire, and then turn the fire to the young man for about 15 minutes after the water boils.

4. Traditional Chinese medicine should be boiled three times. The use of siwutang is no exception. That is, after simmering for 15 minutes, pour out the soup and drink it. Remember not to pour it all out, and leave some water in the casserole. Pour water into the casserole again, cook it again, and then pour out the soup. Add water in the same way and pour out the decoction three times.