A wisdom tooth infection is treated by addressing the source of the infection itself, not just the symptoms. In most cases, that means a dental procedure to clean out trapped bacteria, sometimes combined with antibiotics if the infection has started to spread. While you wait for professional treatment, over-the-counter pain relievers and simple home care can help manage the pain and swelling.
Most wisdom tooth infections are a condition called pericoronitis, which happens when a wisdom tooth only partially breaks through the gum. A flap of gum tissue forms over the exposed portion of the tooth, and food, bacteria, and debris get trapped underneath it. That warm, enclosed space becomes a breeding ground for infection.
What a Wisdom Tooth Infection Looks and Feels Like
An acute infection typically causes severe pain around your back teeth, red and swollen gums, and pus or drainage near the affected area. You might also notice swollen lymph nodes in your neck, pain when swallowing, difficulty opening your mouth fully, or a fever. These symptoms tend to come on relatively fast and get worse over a day or two.
Chronic, lower-grade infections look different. You may only notice a mild, temporary ache near the back of your mouth, persistent bad breath, or a bad taste that won’t go away. These episodes can come and go for weeks or months, but each flare-up risks progressing into something more serious.
Why Dental Treatment Comes First
The American Dental Association’s current clinical guidelines recommend against using antibiotics for most dental infections when the infection is localized. The reason is straightforward: antibiotics can’t reach bacteria trapped under gum tissue or inside dead tooth structures very effectively, and overusing them contributes to antibiotic resistance. Instead, the priority is physically removing the source of infection through cleaning, drainage, or extraction.
Your dentist will examine the area, likely take X-rays to check the roots and rule out cavities, and then recommend one of two procedures depending on your situation:
- Gum flap removal (operculectomy): If the wisdom tooth appears to be erupting normally and has enough room, the dentist may simply cut away the flap of gum tissue that’s trapping bacteria. This is a minor in-office procedure.
- Wisdom tooth extraction: If the tooth is partially or fully impacted, extraction is the more reliable long-term fix. In some cases, your dentist will remove both the upper and lower wisdom teeth on the affected side to prevent the upper tooth from biting into the healing gum and re-triggering infection.
If there’s active, significant infection at the time of your visit, your dentist may irrigate and drain the area first, prescribe antibiotics, and schedule the extraction for after the acute infection subsides.
When Antibiotics Are Necessary
Antibiotics enter the picture when the infection shows signs of spreading beyond the immediate area. If you develop a fever, facial swelling, or general malaise, those are signs of systemic involvement, and your dentist will prescribe antibiotics alongside the dental treatment.
The standard first-line option is amoxicillin, typically taken three times a day for three to seven days. If you’re allergic to penicillin-type drugs, alternatives include azithromycin or clindamycin. If the initial antibiotic doesn’t produce improvement, your dentist may switch to a stronger combination or add a second antibiotic targeting a broader range of bacteria.
You can generally expect to feel less pain and notice reduced swelling about 48 to 72 hours after starting antibiotics. However, fully clearing the infection typically takes seven to ten days. It’s important to finish the entire course even if you feel better after a few days.
Managing Pain at Home
The most effective over-the-counter approach for dental pain is taking ibuprofen and acetaminophen together. This combination has been shown to match or outperform opioid-based painkillers for dental pain. For moderate to severe pain, the recommended approach is 400 to 600 mg of ibuprofen every six hours alongside 500 to 650 mg of acetaminophen every six hours. Keep your total daily acetaminophen under 3,000 mg.
These two medications work through different pathways, so combining them provides a stronger effect than doubling up on either one alone. Take the ibuprofen with food to protect your stomach.
Beyond medication, a few simple measures can help while you’re waiting for your dental appointment:
- Warm saltwater rinses: Half a teaspoon of salt in a cup of warm water, swished gently around the affected area several times a day, helps reduce bacteria and draw out some of the swelling.
- Soft foods: Avoid chewing on the infected side, and stick to foods that won’t get lodged under the gum flap.
- Gentle cleaning: Carefully brush around the area and use a small syringe or water flosser on a low setting to flush debris from under the gum flap.
Signs the Infection Is Spreading
Left untreated, pericoronitis can develop into an abscess. When that happens, infection can spread beyond the mouth into the neck, chest, or bloodstream. In severe cases, this can become life-threatening.
Seek immediate medical attention if you experience any of the following: swelling that extends into your face, cheek, or neck; difficulty swallowing or breathing; inability to open your mouth; fever with chills, shivering, or a rapid pulse. These are signs the infection has moved beyond what home care or a routine dental visit can handle, and you may need emergency treatment.
Preventing Recurrence
If you’ve had one episode of pericoronitis, it’s likely to come back. The gum flap that caused the original infection doesn’t go away on its own, and bacteria will continue to collect underneath it. Chronic pericoronitis can flare up repeatedly over months or years, each time carrying the risk of progressing to a more serious infection.
Extraction is the most definitive solution for a wisdom tooth that keeps getting infected. If your dentist recommends keeping the tooth and you’ve had the gum flap removed instead, keep the area meticulously clean and watch for early signs of re-infection, like mild achiness or a returning bad taste, so you can act before it escalates.