Home > Medical > Stop-smoking > Stop Smoking News Vaping and lung damage in teens: What's the real link? E-cigarette vapour contains potentially harmful chemicals, and some prior studies have linked vaping to bronchitis, coughing and phlegm among teenage users. Only smoke socially? You're still at high risk of lung cancer New research shows that smoking less doesn't significantly reduce your chances of lung disease. You need to quit altogether. Toxins form when e-cigarette chemicals mix, study says Chemicals in e-cigarettes can irritate the airways and trigger reactions that result in breathing, heart and blood vessel problems. From our sponsor Sponsored: Be prepared to stop smoking Sponsored: Are you ready to put down that cigarette?