What would happen if person stopped smoking cigarettes for just one day?

Withdrawals: You would most likely have withdrawal symptoms like achiness, irritability and trouble sleeping. This is what is referred to as "cold turkey" and it can vary tremendously in patients from how much they smoke before quitting and their own sensitivity. You might want to consider having your doctor prescribe a medicine like Chantix or wellbutrin (bupropion) to help or use a nicotine sustitute to help.