Reviewed by Dr. Michael Richer, DDS, general dentist
A sore throat after dental work is usually mild and short-lived. It can come from the numbing injection, a dry mouth, water and suction near the back of your throat, or breathing through your mouth during a long appointment, and it typically eases within a few days. Call your dentist if it’s getting worse instead of better, or if you have a fever or swelling. If you have trouble breathing or swallowing, or swelling spreading toward your eye or neck, get emergency care right away. R+R Dental’s team is happy to answer questions after any visit.
Sore Throat After Dentist Numbing
Before dental procedures, dentists use local anesthetics to numb specific areas of your mouth. These medications act as temporary roadblocks, preventing pain signals from reaching your brain. This keeps you comfortable during treatment.
A sore throat is a discomfort or pain caused by inflammation of the throat tissues. It’s not uncommon to experience a sore throat after a dental appointment where numbing anesthesia was used. This irritation usually isn’t a cause for concern and should fade within a day or two.
The soreness you might feel after numbing can include:
- A scratchy or irritated sensation in your throat
- A dry and uncomfortable feeling in your throat
- Mild pain, especially when swallowing
These symptoms typically appear shortly after your appointment and resolve on their own within a day or two.
How Long Does a Sore Throat Last After Dental Work?
Most sore throats after a routine visit, such as a cleaning or a filling, fade within a day or two. After a longer appointment or a root canal, it can take a few days. After a tooth extraction, especially a wisdom tooth, swallowing can stay uncomfortable for a few days while the swelling goes down.
If your throat is getting worse after the first few days instead of better, or the pain is severe, call your dentist so they can rule out an infection.
Causes of Sore Throat After Dental Work
Post-dental numbing sore throat is often caused by harmless factors related to your dental procedure. Here are possible culprits:
Anesthetic Irritation
The numbing medication itself can irritate the tissues in your throat as it wears off. This can lead to a scratchy or burning feeling, especially if it comes into contact with the mucous membranes in your mouth and throat during the injection or procedure.
Dry Mouth
Anesthesia often reduces saliva production, leading to a dry mouth. Saliva plays a vital role in keeping your mouth and throat moist and comfortable. When your mouth dries out, the tissues in your throat become irritated, contributing to the scratchy sensation.
Strained Muscles
Holding your mouth open for extended periods during dental work can strain the muscles in your jaw, throat, and even neck. This strain can sometimes manifest as a sore throat or discomfort in the surrounding area.
Water Spray and Suction
During a cleaning or a filling, water spray, suction, and polishing paste can reach the back of your mouth. Along with breathing through your mouth for a while, that can leave your throat scratchy or dry for the rest of the day.
A Breathing Tube During General Anesthesia
If you had dental surgery under general anesthesia, for example with an oral surgeon or in a hospital, a breathing tube may have been placed in your throat while you were asleep. A sore throat afterward is a common side effect of the tube. In studies of patients who had a breathing tube, about a third had a sore throat an hour after surgery, and about half as many still did the next day.
Swallowing Irritants
In some cases, you might accidentally swallow small amounts of blood, anesthesia, or other materials used during the procedure. While not harmful, these can irritate your throat and contribute to temporary soreness.
In rare cases, a sore throat after dental work could be a sign of infection. If your sore throat is severe, accompanied by fever, or doesn’t improve within a few days, be sure to consult your dentist or doctor.
Sore Throat After a Filling, Root Canal, Cleaning, or Extraction
After a Filling
Fillings usually mean a numbing injection and some time with your mouth open. Any throat soreness tends to be mild and gone within a day or so, often by the time the numbness wears off.
After a Root Canal
A root canal usually takes longer than a filling, and you hold your mouth open the whole time. That can leave your jaw and the injection site sore for a couple of days, and your throat may feel dry or scratchy. Our post on what to eat after a root canal covers the first few days.
After a Cleaning
A routine cleaning doesn’t usually involve numbing, but water spray, suction, and a long stretch of breathing through your mouth can leave your throat a little scratchy. That typically settles the same day.
After a Tooth Extraction
Swelling after an extraction, especially of a lower wisdom tooth, can make your throat feel sore and swallowing uncomfortable for a few days. Follow your aftercare instructions, and call the dentist or oral surgeon who did the extraction if the swelling spreads, you can’t open your mouth, or you develop a fever. If swallowing or breathing becomes difficult, get emergency care.
Our post on anesthesia for wisdom teeth removal explains the numbing and sedation options.
Preventive Measures to Reduce the Risk of a Sore Throat
A scratchy throat after numbing is common, but there are steps you can take to minimize the discomfort:
Communicate with Your Dentist
Before the procedure, communicate any concerns or past experiences of sore throat with your dentist. They can adjust their technique or provide additional guidance to reduce discomfort.
Stay Hydrated
Ensure you are adequately hydrated before and after the dental procedure. Sipping water helps keep your mouth and throat from drying out.
Ask for Short Breaks
On a longer appointment, it’s fine to ask for a moment to close your mouth, swallow, and rest your jaw. Let your dentist know if water is collecting at the back of your mouth so they can adjust the suction.
Use Throat Lozenges
Consider using throat lozenges or sucking on ice chips after the procedure to soothe any irritation and reduce inflammation in the throat.
Treating Sore Throat After Dental Anesthesia
A sore throat after numbing is usually temporary and resolves on its own. However, if the discomfort lingers or feels severe, here are home remedies to find relief:
Hydration
Hydration is key! Sip on cool or lukewarm water throughout the day to keep your mouth and throat moist.
Soothing Lozenges
Sucking on sugar-free lozenges or cough drops can stimulate saliva production and ease throat irritation. Opt for menthol or honey-flavored varieties for added comfort.
Warm Saltwater Gargle
Mix half a teaspoon of table salt into a glass of warm water. Gargle gently for a few seconds, then spit. This can help reduce inflammation and provide temporary relief. If you’ve just had a tooth removed, follow your dentist’s instructions on when and how to rinse instead, since rinsing too soon or too hard can disturb healing.
Over-the-Counter Pain Relievers
Medications like ibuprofen or acetaminophen can help manage mild pain or discomfort associated with your sore throat.
Rest and Relaxation
Give your body time to heal. Avoid strenuous activity and get plenty of sleep to allow your throat to recover.
If your sore throat worsens, becomes severe, or persists for more than a few days, consult your dentist or doctor. They can rule out any underlying issues and recommend additional treatment if needed.
When to Seek Professional Help for a Persistent Sore Throat
Most sore throats after numbing vanish within a few days. But there are times when professional help is best. Here’s what to watch for:
Severity and Duration
If the pain is severe or makes eating, swallowing, or sleeping difficult, see your dentist or doctor. A sore throat lasting more than three to four days also warrants a checkup.
Extra Symptoms
A sore throat paired with fever, chills, swollen glands, earaches, or trouble breathing could signal an infection beyond the numbing medication. Call your dentist or doctor if you notice any of these. If you have trouble breathing or swallowing, or swelling that spreads into your face or neck, go to an emergency room or call 911.
Bleeding or Pus
If you notice unusual bleeding or white pus around the dental work area, this could be an infection and needs prompt medical attention.
Worsening Symptoms
If your sore throat gets worse instead of improving, consult a dentist or doctor. They can identify the cause and recommend the right treatment.
Sore Throat After the Dentist: Common Questions
Can Novocaine cause a sore throat?
It can contribute. Novocaine is the name many people still use for dental numbing medicine, and the injection spot can stay sore for a day or so. A numbing shot for the lower teeth often numbs part of your tongue as well, which can make swallowing feel strange until it wears off.
Why does only one side of my throat hurt?
Usually because that’s the side that was numbed and worked on. A shot for the lower teeth is given toward the back of the mouth, so that side can feel sore for a day or two. If the pain on that side keeps growing after two or three days, or comes with a fever, swelling, or trouble opening your mouth, call your dentist. Trouble swallowing or breathing needs emergency care.
Can you get strep throat from dental work?
Strep throat isn’t a known side effect of dental work. Strep throat is a bacterial infection spread by close contact with someone who has it, and a strep test is the way to confirm it. If you have a fever, swollen glands, or white patches in your throat, see your doctor, since an unrelated illness can show up around the time of a visit.
Why does my throat feel dry or scratchy after a long appointment?
Breathing through your mouth for an hour or more can dry out your throat. Sip water and rest your voice, and it should settle within a day or so.
Tips for a More Comfortable Visit and Recovery
At R+R Dental, we want your dental experience to be comfortable. Here are some expert tips to minimize discomfort during and after your procedure:
- Hydration Is Key: Staying well-hydrated before and after your appointment can help prevent a dry mouth and throat soreness after dental injections.
- Relax Your Jaw: Let the dentist know if you feel jaw tension. Clenching can contribute to discomfort.
- Communicate Openly: Don’t hesitate to tell your dentist about any pain or discomfort you experience. They can adjust their approach for your comfort.
If you have questions after a visit, or you’re due for one, book an appointment or call (516) 874-7834. We’ll explain each step and check in as we go, so you can feel comfortable from start to finish.
