A woman, 38 years old, suffering from vertigo, unable to endure labor, lasting for 7 years, accompanied by chest fullness and a constant desire to vomit. Despite numerous treatments over the years, there was no improvement. Upon detailed review of her medical history, it was found that her condition worsened at the end of spring and the beginning of summer, and alleviated from early autumn to winter. Examination revealed a slippery pulse, and symptoms of vertigo with a desire to vomit, indicating that the disease was in the upper jiao, a sign of phlegm obstruction. According to the principle of "in spring, emetic therapy is appropriate" and "relieving disease in the upper by emetic therapy", the treatment was guided by the condition, switching to emetic therapy. The prescription used was Muskmelon Base Powder, one dose. After taking it, she vomited a large amount of phlegm, and the 7-year stubborn illness was cured in one emesis.