Hello. Welcome to hcm.
As we smoke,it contains many chemicals which cause varied effects. One such effect is constriction of blood vessels. When it happens,the blood supply decreases to nerves causing numbness
. You should immedietly stop smoking
and consult a cardiologist
who wil examine your heart and blood vessels and see if there is any narrowing or clots present. If everything is normal,then you need to have complete eveluation with neurologist