A dentist treats an abscessed tooth by first controlling the infection, then either saving the tooth with a root canal or removing it entirely. The exact approach depends on how far the infection has spread and whether the tooth can be preserved. Most people start feeling relief within a day or two of treatment, with full recovery taking one to two weeks.
What Happens at the First Visit
Your dentist will tap on and around the affected tooth to check for sensitivity, since abscessed teeth are almost always painful when pressure is applied. They’ll also feel along your gums and jaw for swelling. An X-ray confirms how far the infection extends, whether it has reached the bone, and whether the tooth’s root structure is intact enough to save.
If there’s visible swelling with a pocket of pus, the most immediate step is draining it. The dentist makes a small incision into the abscess, lets the pus escape, and rinses the area with saline. Sometimes a small rubber drain is placed to keep the site open while swelling goes down over the next day or two. This alone provides significant pain relief because it releases the pressure that’s been building inside the tissue.
Why Numbing Can Be Tricky
One thing that catches people off guard: local anesthesia doesn’t always work well on infected tissue. The infection creates an acidic environment around the tooth, and that acidity prevents numbing agents from functioning properly. The lower the pH of the tissue (and in the presence of pus, it can drop well below normal), the less effective standard injections become.
Dentists have ways around this. They may use a nerve block farther from the infection site, apply a higher volume of anesthetic, or buffer the solution with sodium bicarbonate to raise its pH closer to normal levels. If you’ve heard stories about abscess treatment being painful, this chemistry is usually the reason, and it’s also why getting treated early, before infection worsens, makes the whole experience easier.
Root Canal: Saving the Tooth
When the tooth structure is still solid enough to keep, a root canal is the standard treatment. The dentist removes the decayed portion and creates an opening through the crown to access the pulp chamber, which is the soft tissue inside the tooth where the infection lives. Using small instruments, they remove the infected pulp, then flush and clean the root canals thoroughly.
Once the canals are free of infection and dried, they’re filled with a rubber compound and sealer paste. A dental filling goes on top to seal everything off from saliva and bacteria. In most cases, the tooth will later need a crown to restore its strength, which happens at a follow-up appointment. The root canal itself typically takes one or two visits, each lasting about an hour.
Extraction: When the Tooth Can’t Be Saved
If the infection has destroyed too much of the tooth or its supporting bone, extraction is the better option. This is also the route when the tooth has fractured below the gumline or when repeated infections have made it unreliable long term. The procedure is straightforward for most teeth: the dentist loosens the tooth, removes it, and cleans out any remaining infected tissue from the socket.
Teeth that are broken down to the root or positioned awkwardly may require a surgical extraction, where the dentist removes a small amount of bone or sections the tooth into pieces to get it out. After extraction, you’ll discuss replacement options like an implant, bridge, or partial denture, though that planning happens once the area has fully healed.
Antibiotics and Pain Management
Antibiotics are not always necessary. Current American Dental Association guidelines recommend them primarily when the infection shows signs of spreading beyond the immediate area, such as facial swelling, fever, or swollen lymph nodes. For a contained abscess that can be drained or treated with a root canal right away, the physical procedure itself removes the source of infection.
When antibiotics are prescribed, amoxicillin is the preferred first choice at 500 mg three times daily for three to seven days. Your dentist will typically tell you to stop taking them 24 hours after your symptoms resolve, even if that’s before the full course is finished. For people with penicillin allergies, alternatives include azithromycin or clindamycin. If the first antibiotic doesn’t work, your dentist may add a second one or switch to a broader option.
For pain, over-the-counter options usually handle post-treatment discomfort well. Many dentists recommend alternating ibuprofen and acetaminophen, which together can be as effective as prescription painkillers for dental pain.
Recovery Timeline
Swelling typically starts going down within 48 to 72 hours after treatment. If you had a drainage procedure alone, recovery often takes just a few days once the pressure is released. After a root canal or extraction, most people fully recover within one to two weeks, though the severity of the infection plays a role. You’ll likely have a follow-up appointment so your dentist can confirm healing is on track.
During recovery, stick to soft foods on the opposite side of your mouth, keep the area clean, and avoid very hot or cold drinks near the treatment site. Some soreness at the incision or extraction site is normal for the first few days.
Signs the Infection Is Spreading
Most abscessed teeth respond well to treatment, but an untreated or undertreated infection can spread into the jaw, throat, or neck. If you develop a fever along with facial swelling and can’t reach your dentist, go to an emergency room. Difficulty breathing or swallowing is especially urgent, as these can signal the infection is compressing your airway. This is rare, but it’s the reason dentists take abscesses seriously and treat them promptly rather than taking a wait-and-see approach.