In a prospective study of 230 patients followed up for 5 years after hospital admission for acute non-specific abdominal pain, 21 patients (9 patients) could not be traced, and 11 (5 percent) had died. Only one death was related to symptoms from the first admission. Of the remaining 198 patients, 77 percent were healthy and free of any symptoms during the observation period. Fourteen patients (7 percent) had been hospitalized once more due to acute abdominal pain; 5 had acute appendicitis. The others had diagnosed recurrences of nonspecific abdominal pain. Sixteen percent complained of continuing of intermittent abdominal symptoms, mainly of benign colonic or gynecologic origin, while malignant disease developed in 1 percent (or 4 percent of patients over 50 years of age). It is concluded that control of these patients is generally unnecessary, but when symptoms recur further examinations, especially for colonic or gynecologic disease, should be carried out. In patients over 50 years old, the possibility of malignant disease should be kept in mind.