[header] How to get your grandmother to stop smoking [title] Share with your grandma that tobacco causes cancer. [step] Lung cancer is the most common type of cancer brought on by smoking, but smokers also have an increased risk for cancer of the throat, kidney, esophagus, bladder, stomach, colon, rectum, and cervix. Cigarettes contain at least 69 chemicals known to cause cancer. 
This compelling information will surely dissuade your grandmother from smoking. [substeps] Cancer is usually determined by medical diagnosis, but some symptoms are easy to identify.