After a root canal, the treated tooth is temporarily vulnerable. A temporary filling or crown is holding things together until your permanent restoration is placed, and the surrounding tissue needs time to recover from the procedure. What you eat, drink, and do in the first few days matters more than you might expect.
Skip Eating for the First Hour
Your mouth will still be numb from local anesthesia when you leave the office. Chewing while your tongue, lips, or cheek are numb is a reliable way to bite down hard on soft tissue without realizing it. Wait until full sensation returns before eating anything. The American Association of Endodontists also recommends avoiding hot or cold liquids and smoking during this first hour.
Foods That Can Damage the Temporary Filling
For the first few days, your temporary filling or crown is the only thing protecting the inside of your tooth. It’s not as durable as a permanent restoration, and certain foods can crack, dislodge, or pull it out entirely.
Avoid these categories until your permanent crown is placed:
- Hard or crunchy foods: chips, pretzels, nuts, raw carrots, hard bread, ice
- Sticky foods: caramel, taffy, chewing gum, gummy candy
- Very hot or cold foods and drinks: stick with warm or room-temperature options, since extreme temperatures can trigger sensitivity in the treated area
Soft, nutrient-dense foods are your best option. Think scrambled eggs, yogurt, mashed potatoes, pasta, bananas, and soup that’s cooled to a comfortable temperature. Spicy foods can also irritate the area and are worth skipping for a few days.
Chew on the Opposite Side
For at least the first 24 hours, avoid chewing on the side of your mouth where the root canal was performed. This gives the anesthesia time to fully wear off and lets the tooth stabilize. But the precaution extends beyond that first day. If you have a temporary filling or crown, you should continue chewing on the opposite side until your dentist places the permanent restoration, which typically happens within a few weeks.
Even light biting pressure on a tooth with a temporary filling carries risk. The tooth itself is more brittle after a root canal because the living tissue inside has been removed, and a temporary restoration simply isn’t designed to handle full chewing force.
Get Your Permanent Crown Promptly
Most dentists recommend placing a permanent crown within two weeks of the root canal. This window gives residual sensitivity and inflammation time to fade while minimizing the risk of the tooth fracturing or the temporary filling failing. Delaying beyond this window is one of the most common mistakes people make after a root canal. A tooth without its permanent restoration is significantly more prone to cracking, which can mean losing the tooth entirely and undoing the whole procedure.
Avoid Aspirin for Pain Relief
Some soreness and sensitivity after a root canal is normal and typically resolves within a week. For pain management, ibuprofen (600 mg every six hours or 800 mg every eight hours) is the standard recommendation from Harvard School of Dental Medicine. If you can’t take ibuprofen, acetaminophen is an alternative.
Do not use aspirin. It thins the blood, which can increase bleeding at the treatment site and slow healing. This is a detail many people overlook when reaching for whatever pain reliever is in the medicine cabinet.
Hold Off on Intense Exercise
Wait at least 24 to 48 hours before returning to moderate or intense physical activity. Strenuous exercise raises your blood pressure and heart rate, which can intensify inflammation around the treated tooth and worsen any throbbing sensation. Heavy lifting is particularly worth avoiding for at least 48 hours.
When you do return to activity, start with low-impact cardio and build back gradually. If you notice increased throbbing or pain during a workout, that’s your signal to stop and give it another day.
Don’t Smoke
Smoking is one of the worst things you can do for a healing tooth. Tobacco smoke reduces blood flow to the small vessels serving the tooth root, cutting off the nutrient supply that cells need to repair tissue. It also lowers the blood’s ability to carry oxygen and suppresses key immune functions that fight lingering infection. Research published by the National Institutes of Health found that smoking impairs the body’s response to infection, accelerates bone loss in the oral cavity, and damages the lining of blood vessels. All of these effects work directly against the healing your tooth needs after a root canal. Avoid smoking for as long as possible during recovery, and know that every cigarette during this period increases your risk of complications.
Be Gentle With Brushing and Flossing
You don’t need to stop brushing or flossing after a root canal. In fact, keeping the area clean helps prevent new infection. But be gentle around the treated tooth for the first few weeks. Aggressive brushing can irritate inflamed gum tissue, and forceful flossing near a temporary filling could loosen it. Use a soft-bristled toothbrush and take extra care when you’re near the restoration.
Warning Signs Worth Watching
Most people recover from a root canal in less than a week. Some lingering sensitivity is normal, but pain that persists beyond a week, or pain that gets worse rather than better, is not. Throbbing pain in particular can indicate that infected tissue remains inside the tooth and needs further treatment. Visible swelling, a fever, or a bite that feels noticeably “off” are also reasons to contact your dentist rather than waiting it out.