Ulcerative colitis seldom associated with nutritive and/or salicylate allergy. Authors present a case of both allergic events at the course of the disease. In 1996 a 19-year-old girl was referred with a history of blood in stool as well as diarrhoea, suggesting ulcerative proctitis. Biopsy revealed ulcerative colitis of the rectum mucosa with eosinophilic infiltration and 20% peripheral eosinophilia was found. Allergic origin and worm infection were ruled out, and after tinidazol treatment, four year elapsed without any signs or symptoms. In December 2000 blood in stools and upper abdominal complaints developed without peripheral eosinophilia. Gastroscopy and biopsy showed a mild chronic gastritis. Olsalazine, budesonide enema and famotidin treatment were started, but then later changed to mesalazine and pantoprazol, because of the constant stomach complaints. The next five months passed without any symptoms. The patient had to break off her seashore journey in July 2000 because of stomach complaints, vomiting and exsiccosis. Peripheral eosinophilia (27.3%) was evident. Gastroscopy revealed erosive ulcers and the biopsy showed eosinophilic gastritis. Biopsies from the jejunum, duodenum and antrum as well as enteroscopy and biopsies from the rectum showed mild eosinophilic infiltration. An allergy test proved the presence of IgE against salicylate, egg protein, seafood protein and the lymphocyte transformation test was also positive against salicylate. Oral food challenges proved to be negative and the amino-salicylate treatment was stopped. After a temporary symptom free period, bloody stools reappeared in May 2003; the peripheral eosinophilia still existed, but had decreased (22.2%). Esomeprazol, and methyl-prednisolone containing enema (40 mg/day/2 weeks) followed by budesonide enema twice a week resulted in a symptom free period and peripheral eosinophilia became almost normalised (6.2%). The authors report a case having ulcerative proctitis first, than nutritive and salicylate allergy with eosinophilic gastritis and a proctitis flare-up thereafter.