Digestion Q&A by Dr. Lee

Answer:

Digestive Disease Myths Slideshow

It has been reported in many studies that cigarette smoking causes Crohn's disease to become worse yet causes ulcerative colitis to become better. The reason for this is unknown. One must also keep in mind that although smoking may be slightly beneficial for ulcerative colitis, it increases the risk of lung and cardio-vascular disease for both the individuals who smoke and others around him or her.

Thank you for your question.