The doctor may recommend nutritional supplements, especially for children whose growth has been slowed. Special high-calorie liquid formulas are sometimes used for this purpose. A small number of patients may need to be fed intravenously for a brief time through a small tube inserted into the vein of the arm. This procedure can help patients who need extra nutrition temporarily, those whose intestines need to rest, or those whose intestines cannot absorb enough nutrition from food. There are no known foods that cause Crohn’s disease. However, when people are suffering a flare in disease, foods such as bulky grains, hot spices, alcohol, and milk products may increase diarrhea and cramping.