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Fact Sheet
Health

Smoking and Other Health Conditions

ASH
Aug 2025
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Introduction

Smoking is the leading cause of premature, preventable death globally. Tobacco kills up to two-thirds of its long-term users, which equates to 8 million deaths a year globally. As well as being lethal, smoking harms nearly every organ of the body and affects a person’s overall health. It is well-known that smoking causes cancer, lung disease and heart disease, and that smoking while pregnant can harm foetal development. This factsheet lists some of the other health impacts of smoking: diabetes, eye and mouth diseases, multiple sclerosis, meningococcal disease causing meningitis and septicaemia, and dementia.

See also:

ASH Factsheet: Smoking and Cancer

ASH Factsheet: Smoking, the Heart and Circulation

ASH Factsheet: Smoking and Respiratory Disease

ASH Factsheet: Smoking, Pregnancy and Fertility

ASH Factsheet: Smoking and Mental Health