Nicotine itself, constricts blood vessels and affects nerves and the heart. When the nerves don't get enough circulation, there is tingling/burning which can be PN or just paresthesias.
Chewing tobacco also presents a risk of mouth cancers.
It would probably be best to quit.
Inhaling cigarettes smoke carries other toxins, like cyanide, carbon monoxide and carcinogens into the blood.
__________________
All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
************************************
.
Weezie looking at petunias 8.25.2017
****************************
These forums are for mutual support and information sharing only. The forums are not a substitute for medical advice, diagnosis or treatment provided by a qualified health care provider. Always consult your doctor before trying anything you read here.