Hi. Thanks for your query. Noted the history and understood your concerns. Vomiting, need to rush to toilet after eating, pus cells on stool examination indicate that you have sort of a Gastroenteritis. Hence I would advise you the following in such a situation: Get an appropriate course of an antibiotic, metronidazole and probiotics. Take plenty of oral fluids, boiled and cooled water to avoid dehydration also take electrolyte solution to avoid electrolyte imbalance. Laos insist for the further investigations such as CT scan of abdomen to rule out any mass lesion, diverticulitis or so as you have to go for toilet on food. If the medical management as discussed above fails to relieve your symptoms or if the stool tests still show pus cells, colonoscopy and biopsy is highly advised. Clinical evaluation and examination bya Gastroenterologist may help you clarify the diagnosis and get the best possible management till you get cured.