Ask yourself some questions to see whether you smoke to relieve tension, irritability, and stress or to improve your mood.
The stress relief you get from smoking comes from the act of taking time out to smoke a cigarette and from the chemical actions of nicotine in your brain. If you return to the scene of the stressful event after you finish your cigarette, it doesn't take long before the tension comes back and you need another cigarette.
Smoking doesn't really make stress, tension, or depression go away. The only way to truly control the stress in your life is to identify what causes stress for you and learn how to change the way you react to stressful events and situations.
WebMD Medical Reference from Healthwise