Why do my nerves tingle threw my body when I smoke weed?

Answer 1

The THC in weed stimulates dopamine release, that can cause tingles and warmth in your body. It has to do with certain receptors in the brain being stimulated by the THC, the receptors that are fired when you feel happy and relaxed.

Sounds right but in fact it is not. The THC in marijuana, act as an expander for your veins. Like smoking cigarettes, which contracts your veins, making your blood flow slower, Marijuana does the same thing to the opposite effect, wider veins, more/stronger blood flow to the brain, and that warm tingly sensation. It's also the cause of the red eye effect, since our eyes are white it is easy to see the stronger blood flow, giving the discolored/glossy/red eyes.