tobacco contains What is nicotine and other facts | PMI Nicotine Pouches vs Chewing Tobacco
Description
These ulcers are usually caused by chronic irritation or ingestion of certain foods, improper dental restoration, cheek biting, smoking, and prostheses

Do not ignore symptoms such as: Persistent cough lasting more than three weeks Mouth ulcers that do not heal White or red patches inside the mouth (leukoplakia or erythroplakia) Voice changes or hoarseness Difficulty swallowing Chest pain or breathlessness Unexplained weight loss Frequent respiratory infections If you notice any of these warning signs, seek medical attention immediately
This gateway effect could reverse the progress weve made in reducing smoking rates
Springer, Tokyo

T., Froese, C
