The expression of "small intestine and lower abdomen are urgent" in the eight-character numerology is the earliest numerology book box "Yuzhaoding Zhenjing", which says: "(Water and soil) re-enters the highest day, and the small intestine and lower abdomen are urgent." Zhang Qing commented: "When the soil and water arrive, it is the place where tombs gather. If two images see each other at the same time, it will lead to acute diseases of small intestine and abdomen, and blood gas disease of women. Let's assume that this year is the Year of the Boxer Rebellion. At a certain time of the year, water and soil will meet in the middle of the sky, with men's small intestines and women's blood. Imitate this outside. "
If the ancient prose is difficult to understand, it can be explained as follows: when water and soil are born on the highest day of the day, that is, the day of Renchen and Chen Geng, this life will lead to diarrhea; In severe cases, men will have small intestinal hernia, including indirect inguinal hernia; Female life has umbilical hernia, leucorrhea, dysmenorrhea and so on. According to the ancients, Chen refers to the highest heaven as punishment, and Chen Ye refers to the abdomen of human body. It can also be understood that abdominal diseases are broader.