Smoking is harmful to your health and quitting this bad habit can reduce your risk of developing many diseases. But kicking the butt is not as easy as it sounds. People who have smoked heavily for many years may experience temporary physical and psychological withdrawal effects after they stop using tobacco. Nicotine is the main addictive substance in tobacco. Since your body is used to having it quitting smoking can result in nicotine cravings. Other common nicotine withdrawal symptoms include anger frustration and irritability anxiety depression weight gain dizziness increased dreaming headaches and constipation. Yes constipation is a withdrawal symptom