What does it mean if you feel numv in hands and feet while smoking?

Smoking can constrict blood vessels which limits the amount of oxygenated blood causing a cold numb feeling. This happens especially to the limbs because they are farthest from the heart.

Eating right and exercising daily

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle