Smoking is a detrimental habit but this does not prevent people from smoking. Nicotine is a highly addictive substance which makes people crave for it, and the more they smoke, the more they need it.
When smokers do not take nicotine, they feel great discomfort, which is a manifestation of the withdrawal phase. The physical symptoms will stop in a week, but the cravings need more time.
- Healthy Food House