Nicotine is a highly addictive substance that activates the brain's reward pathways, leading to the release of dopamine and creating feelings of pleasure and satisfaction. This reinforcement of positive feelings can make it difficult for a smoker to quit using cigarettes, as they may experience intense cravings and withdrawal symptoms when trying to quit. Additionally, nicotine dependence can lead to physical and psychological dependence, making it challenging for individuals to break the habit of smoking.
