Most people recover from a root canal within a few days, with the worst soreness concentrated in the first 24 to 48 hours. Full internal healing of the bone and tissue around the tooth root takes longer, typically about three months, but this process happens in the background and rarely affects your daily life. Here’s what to expect at each stage.
The First 48 Hours
When you leave the dentist’s chair, your mouth will still be numb from the local anesthetic. That numbness generally wears off within two to four hours. Once it does, you’ll start to notice mild to moderate soreness around the treated tooth, tenderness when biting down, and possibly slight swelling in the surrounding gum tissue. This is the active healing phase, and it’s completely normal.
Pain during this window is usually manageable with over-the-counter medication. The American Dental Association recommends 200 to 400 mg of ibuprofen every four to six hours for routine root canal discomfort. If your pain is more intense, combining 400 mg of ibuprofen with 500 mg of acetaminophen every six hours is more effective than either drug alone. Taking both on a fixed schedule for the first 24 hours, rather than waiting for pain to build, tends to keep you more comfortable.
The First Week
Pain levels drop substantially within the first week. In a large study of over 1,000 patients, average pain scores fell from 5.3 out of 10 before the procedure to 2.6 out of 10 afterward. By one week, only about 11% of patients reported any pain at all. That said, roughly 14% of patients do experience at least one episode of severe pain (7 or higher out of 10) at some point during that first week, so a bad day or two doesn’t necessarily mean something went wrong.
During this period, you can return to work and normal activities within a day or two for most people. The tooth may feel slightly different from the surrounding teeth for a while, especially when chewing. This is normal and fades as inflammation settles.
What to Eat While You Heal
Stick to soft foods for the first few days, especially if you have a temporary crown or filling in place. Good options include scrambled eggs, yogurt, mashed potatoes, pasta, cooked vegetables, and smoothies. Shredded meat and meatloaf work well if you want something more substantial. Ripe or canned fruit with peanut butter or soft cheese makes an easy snack.
Avoid anything that could pull out a temporary crown or damage the treated tooth: sticky foods like taffy, gum, and caramel, plus hard items like ice cubes, peanut brittle, and hard candy. Very hot or very cold foods and drinks can also trigger sensitivity in the treated area, so lukewarm is your friend for the first few days.
Getting Your Permanent Crown
A root canal removes the nerve and infected tissue from inside your tooth, but the tooth itself still needs protection. Most back teeth will need a permanent crown to prevent cracking under the force of chewing. The typical healing period before crown placement is about three months, though timing depends on several factors.
The size of the original infection matters most. A small, contained infection heals faster, while a larger one with visible damage on X-rays may need more time. Your dentist will usually take follow-up X-rays to confirm healing before placing the final crown. In cases where surgical treatment (an apicoectomy) was needed to address infection at the root tip, healing can take six to twelve months. For straightforward cases, your dentist may place the crown sooner than three months if healing looks good.
Until you get your permanent crown, chew on the opposite side of your mouth when possible. The temporary filling or crown protecting the tooth is not designed for heavy use, and the treated tooth is more fragile without its permanent restoration.
Signs That Something Isn’t Right
Some pain after a root canal is expected, but certain symptoms suggest a problem that needs attention. Persistent or worsening pain beyond the first week, especially pain that intensifies when you bite down, is one of the most common signs of a failed root canal. Swelling or bleeding in the gum around the treated tooth is another red flag.
More serious warning signs include the formation of an abscess (a painful, pus-filled swelling near the tooth), facial swelling, pain radiating to your jaw or ear, or fever and flu-like symptoms. These can indicate that infection remains or has returned, and they typically require retreatment.
Long-Term Outlook
Root canals have a strong track record. The survival rate at five years is about 89%, meaning the vast majority of treated teeth remain functional and symptom-free for years. The key to long-term success is getting the permanent crown placed on schedule and maintaining good oral hygiene around the treated tooth. A root canal saves the natural tooth structure, and with proper restoration, most people use that tooth normally for decades.