That said, when nicotine is exposed to oral tissues, it may be promoting:
-oral cancer
Source: http://www.ncbi.nlm.nih.gov/pubmed/20338106
-gingivitis
Source: http://www.ncbi.nlm.nih.gov/pubmed/20337880
-receding gums
Source: don't have a specific study handy, but this high-level review mentions it, and other issues: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2933534/
Keep in mind, these are all slight chances. If you do this regularly for years, it may be of concern. Every once in a while? No biggie.
Patch will get you around all of these, specific issues at least. There's still that whole 'carcinogenic, overall' thing.
That said, when nicotine is exposed to oral tissues, it may be promoting:
-oral cancer
Source: http://www.ncbi.nlm.nih.gov/pubmed/20338106
-gingivitis
Source: http://www.ncbi.nlm.nih.gov/pubmed/20337880
-receding gums
Source: don't have a specific study handy, but this high-level review mentions it, and other issues: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2933534/
Keep in mind, these are all slight chances. If you do this regularly for years, it may be of concern. Every once in a while? No biggie.
Patch will get you around all of these, specific issues at least. There's still that whole 'carcinogenic, overall' thing.