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Smoking effects ulcerative colitis and Crohn's disease in different ways.

Smoking and Crohn’s disease

Patients who continue to smoke have a more severe course of disease with more complications; have a greater requirement of steroids and immunosuppressive medications; and are more likely to need surgery. This effect is more marked in women, and applies to ileal and colonic Crohn's disease. Ex-smokers run a similar course of disease to non-smokers.

Smoking and ulcerative colitis

In ulcerative colitis smoking protects against the development of the disease; smokers run a more benign course than non smokers; and cessation of smoking is followed by an increase in disease activity, but without an obvious increase in colectomy rate.

Handy tips: With this information in mind, as the risk of mortality is lower in non-smokers than smokers, smoking cessation is encouraged. For information about quitting smoking head to http://www.quit.org.au/


If you are interested in other gastrointestinal-focused information and intervention websites developed and hosted at
Swinburne University of Technology,
please go to:

IBSclinic.org.au for individuals with Irritable Bowel Syndrome

Gastroparesisclinic.org for individuals with Gastroparesis


This website and its content is not intended or recommended as a substitute for medical advice, diagnosis or treatment. Always seek advice of your own physician or other qualified health care professional regarding any medical questions or conditions.

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