Smoking can damage nearly every organ in the body and has serious long-term health consequences. It increases the risk of cancer, heart disease, stroke, lung diseases, and many other health conditions. In the short term, smoking can cause coughing, bad breath, tooth loss, hair loss, headaches, and loss of taste and smell. Cigarettes contain over 7,000 chemicals, many of which are highly toxic and cause cancer, such as arsenic, benzene, formaldehyde, and cyanide.