Tooth infections can be painful and worrying, leading many people to look for quick remedies. One common question is: Can Listerine kill a tooth infection? Let’s dive into the facts, clear up misconceptions, and help you understand when to seek professional dental care.
What Is a Tooth Infection?
A tooth infection, also known as a dental abscess, is caused by bacteria that invade the tooth’s pulp or surrounding gums. This can lead to swelling, pain, and sometimes even fever. Tooth infections need proper care because, if untreated, they can spread to other areas of the body.

What Does Listerine Do?
Listerine is a popular antiseptic mouthwash that many people use daily. It contains active ingredients like:
- Eucalyptol: Fights bacteria and reduces inflammation.
- Thymol: Has antifungal and antibacterial properties.
- Menthol: Provides a refreshing cooling sensation.
- Methyl Salicylate: Helps combat plaque and gingivitis.
These ingredients work together to kill germs in your mouth, reduce plaque, and freshen breath. However, does this mean it can tackle a tooth infection?
Can Listerine Cure a Tooth Infection?
Unfortunately, the answer is no. While Listerine can kill bacteria on the surface of your gums and teeth, a tooth infection often involves deeper tissues where mouthwash cannot reach. A dental abscess forms when bacteria invade the inner pulp of the tooth or the roots, which require professional treatment.
Listerine is not a substitute for antibiotics or dental care when it comes to tooth infections.
When Might Listerine Help?
Although Listerine can’t cure an infection, it might still play a helpful role in your oral care routine:
- Prevention: Regular use of Listerine can help prevent gum disease and cavities, reducing the risk of infections.
- Temporary Relief: If you have mild gum inflammation (not a full-blown infection), Listerine may provide temporary relief by reducing bacteria.
- Post-Treatment Care: After dental procedures, your dentist might recommend an antiseptic rinse like Listerine to keep the area clean.

Signs You Need Professional Help
If you suspect a tooth infection, watch out for the following signs:
- Severe, throbbing toothache
- Swollen gums or face
- Sensitivity to hot and cold
- Pus around the affected tooth
- Fever or general discomfort
These symptoms mean it’s time to visit your dentist. They’ll likely recommend:
- Antibiotics to fight the infection
- Drainage or Root Canal Therapy to address the abscess
- Tooth Extraction if the tooth can’t be saved