How does addiction increase the risk of tobacco-related disease?

Addiction is a primary driver of tobacco-related disease because it compels individuals to maintain a persistent, high-level habit, which repeatedly exposes them to the harmful toxins found in tobacco smoke. While addiction itself is not lethal, it serves as a powerful indirect contributor to illness by ensuring the smoker continues to consume substances that damage the body.12

The risk of developing diseases, such as cancer, is strongly linked to the duration and frequency of exposure to these toxins. Because nicotine creates physical dependence and triggers withdrawal symptoms—such as irritability, anxiety, and cravings—smokers often find it difficult to quit, leading to long-term, chronic use. This cycle of dependency forces the body to endure continuous exposure to carcinogens, which can bind to and damage cellular DNA, eventually leading to the development and spread of malignant cells.213

Ultimately, the addictive nature of tobacco products makes it difficult for users to stop, thereby sustaining the conditions necessary for the progression of respiratory and other systemic diseases.14