Its very publicized smoking causes cancer, high blood pressure, heart attacks and heart disease.  Smoking also causes oral health issues as well.  If you are a smoker, you are increasing your risk of developing oral cancer and gum disease (which leads to tooth loss and loss of jaw bone). 
There are so many different risks’ that come with smoking, these are just a few.

    * Bad breath
    * Tooth discoloration
    * Inflammation of the salivary gland openings on the roof of the mouth
    * Increased build up of plaque and tartar on the teeth
    * Increased loss of bone within the jaw
    * Increased risk of leukoplakia, white patches inside the mouth
    * Increased risk of developing gum disease, a leading cause of tooth loss
    * Delayed healing process following tooth extraction, periodontal treatment, or oral surgery
    * Lower success rate of dental implant procedures
    * Increased risk of developing oral cancer

Heart and blood vessel problems are the main causes of sickness and death among people with diabetes. These problems can lead to high blood pressure, heart attacks, and strokes. Heart and blood vessel problems can also cause poor circulation (blood flow) in the legs and feet.Smoking back pain is one of many side effects of this insidious habit. Smokers are 3 times more likely to develop chronic lower back pain  than non-smokers. Besides back pain, smoking is a known cause and contributor to heart disease, hypertension,  cancer, stroke,
emphysema and birth defects. It is truly time to end this epidemic habit, for the sake of everyone on the planet.

But I have only one reason why I shouldn't smoke,  I want to live.

This one could help.
http://www.stopsmokinghabits.com

Smoking is not a sin. Although smoking can cause a lot of illness in your body. We should take care of our body. Stop smoking!!!! Even though smoking is not a sin, you are still making a sin towards the others because you harm them through smoking.
www.stopsmokinghabits.com