You may find that it's easier to take deep breaths after you quit using cigarettes. According the Lung Institute, your blood pressure will go down the first day your stop smoking and the carbon monoxide in your body will be reduced to healthy levels, which can make breathing easier. Your lungs start to function better after the first month of being smoke-free, which can also make for healthy circulation. After about nine months, you'll be less susceptible to lung infections, since your lung's cilia will start working well again. You should also see a huge reduction in shortness of breath and coughing at this point. As the years go on, your chances of getting lung, throat or mouth cancer will decrease, which can help you breathe better both physically and mentally.Next