why chewing tobacco causes cancer How does smoking cause cancer? Can You Get Oral Cancer

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Gingival melanosis, or darkening of the gingiva, is significantly higher in smokers who smoked more than 10 cigarettes a day

Availability of data and materials The datasets analyzed during the current study are available in the IPUMS repository at Abbreviations NHIS: National health interview survey HR: Hazard ratio CI: Confidence interval IPUMS: Integrated public use microdata series NDI: National Death Index ICD: International classification of diseases and related health problems BMI: Body mass index CPS: Cancer prevention study TUS-CPS: Tobacco use supplement to the current population survey References Rostron BL, Corey CG, Gindi RM

Throughout history, Tobacco leaves have been used in natural medicines in poultices for skin conditions, swellings, fevers, and headaches