It's Not Just Cigarettes: Vape Residue Sticks on Surfaces Too Thirdhand Smoke Resource Center Incidence of Recurrent Aphthous Ulcer among Vape and Cigarette Smokers European Journal of Dental and Oral Health Some everyday items need a second look before you travel. Aerosol sprays, camphor blocks, and matchsticks are restricted due to safety concerns and are not permitted in cabin or check in baggage. A A mouth ulcer that wont heal could be serious., Most ulcers are harmless, but persistent ones may signal oral cancer symptoms. Early detection ensures simpler treatment, faster recovery, and better