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Symptoms and Diagnosis The diagnosis of COPD often involves lung function tests, chest X-rays, and multiple assessments of symptoms

Why smoke is the main problem The harms of cigarette smoking are well known

Heart rate and blood pressure levels reduce within 20 minutes of stopping smoking, and carbon monoxide levels in the blood fall to normal levels within 12 hours of smoking cessation, according to a February 2020 publication by the World Health Organization , titled Tobacco: Health benefits of smoking cessation . Within 2-12 weeks of quitting, blood circulation and lung functionality improve, and symptoms like shortness of breath and coughing decrease within 1-9 months of stopping smoking tobacco