Rhubarb and Kansui Decoction

金匱要略

In a woman, the lower abdomen is full and shaped like a dun. Urination is slightly difficult but there is no thirst. If this occurs after childbirth, this is water and blood both bound in the blood chamber; Dahuang Gansui Tang governs it. (Jin Gui Yao Lue (Essential Prescriptions of the Golden Cabinet))

Rhubarb 4 liang, Gansui (Kansui) 2 liang, Ejiao (donkey-hide gelatin) 2 liang. The above three ingredients: with 3 sheng of water, boil down to 1 sheng, take in one dose; the blood should then descend. (Shang Han Za Bing Lun)

With 3 sheng of water, boil down to 1 sheng and take it in one dose; the blood should then descend.

湯劑

Break Blood stasis, expel water pathogen, benefit yin and nourish blood; attack the pathogen without damaging the upright qi.

Irregular menstruation; urinary retention in men and women with fullness and pain in the lower abdomen; strangury toxin deeply stagnated, syphilitic strangury with unbearable lower abdominal fullness and pain and urine containing pus and blood. Abdominal distention, internal obstruction by blood stasis, internal retention of water qi, with a large, hard, full abdomen, engorged veins, attacking pain in the hypochondrium and abdomen, difficult defecation, difficult urination, absence of thirst, and a dark tongue with white coating.