What does nicotine do in the body
Nicotine acts directly on the nervous system. Shortly after using it, it triggers the release of neurotransmitters like dopamine and adrenaline. That’s why many people feel more awake, focused, or relaxed.
At the same time, nicotine increases your heart rate and blood pressure and narrows your blood vessels. This puts your body under a bit of constant tension, even if you don’t always notice it.
If you use it regularly, your body gets used to nicotine. If you stop, you might feel restless, irritable, or have trouble concentrating, which explains why it can be addictive.
