Ding, female, 60 years old, contracted a common cold on a certain day in April 1954, with fever and chills, slight headache, and poor appetite. At that time, no treatment was given. More than 10 days later, she experienced fullness and discomfort in the chest, vomited twice profusely, and sweated heavily. The headache and aversion to cold ceased, but symptoms of dry mouth, throat, and thirst for water followed. Unexpectedly, drinking water induced vomiting, and the dryness of the throat persisted. She alternated between drinking and vomiting, day and night, for two days. At that time, her pulse was floating and large, her tongue coating was pale and dry, and she had difficulty urinating with slight fullness in the lower abdomen. Recalling the "Cold-Damage Disease Treatise": "Thirst with a desire to drink water, but vomiting upon drinking, is called water counterflow, and is treated with Five Ingredients with Poria Powder," this formula was decocted and administered. After one dose, the vomiting of water ceased, the thirst was relieved, and the throat became moist.