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Nicotine is an addictive chemical.

This method reduces harmful chemicals by 95% compared to regular cigarettes, as recommended by WHO

If you use any kind of tobacco -- cigarettes, cigars, pipes, chewing tobacco and others -- youre at a greater risk. The Mayo Clinic says to watch out for these early symptoms of oral cancer: A reddish or white patch inside your mouth Loose teeth Ear or mouth pain A lump or growth inside your mouth A sore on your lips or mouth that wont go away If youre experiencing any of these issues and they persist for more than two weeks, see a doctor, Price advised

Just M, Ribera M, Mons E, Lorenzo JC, Ferrndiz C

For others, smell sensitivity appears as part of the migraine itselflike photophobia or nausea