OverviewSmoking cigarettes puts a person at risk for emphysema, lung cancer and other health problems. Second-hand smoke (smoke from a nearby cigarette) may also contribute to these diseases, especially among children.
Update Date 8/1/2015
Updated by: Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital, Boston, MA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.