Conclusion
It is important to note that the remedies listed above are not safe for pregnant or nursing women. Do not apply essential oils on children or older adults. A cold sore, or fever blister can last from 10 to 14 days. In most cases, blisters occur in groups and cause swollen, red, and sore wounds. They usually occur near the mouth or on other areas of the face, but they may also occur on the gums or tongue. Contact your healthcare provider if you still have blisters after using any of the natural remedies listed above.
References
[1] https://www.webmd.com/drugs/2/drug-4376/antibiotic-topical/details
[2] https://www.nhs.uk/conditions/genital-herpes/
[3] https://www.nhs.uk/conditions/antifungal-medicines/
[4] https://www.healthline.com/nutrition/zinc-supplements
[5] https://www.healthline.com/nutrition/lysine-benefits
[6] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3752337/