What happens to the body when a person smokes even 2 cigarettes a day for a month?

Pulmonologist Dr Pooja T said that effects of smoking two cigarettes a day are visible within a month. Nicotine temporarily raises heart rate and blood pressure and causes blood vessels to narrow apart from increasing risk of clot formation. "Even light smoking reduces lung efficiency," she added. It also impacts skin and oral health, causing dull skin or gum irritation.