Numbness after a dental procedure is a common temporary side effect of local anesthesia. Dentists use these medications to ensure comfort during treatment. While the sensation can feel unusual, it is generally harmless and will gradually wear off as the body processes the anesthetic.
Understanding Dental Numbing
Local anesthetics work by temporarily blocking nerve signals from reaching the brain, preventing pain in the treated area. Common medications like lidocaine typically provide numbness for one to three hours, though some anesthetics may extend up to eight hours. The duration of numbness can vary based on the specific anesthetic, amount used, and injection site. Areas with denser nerve supply, such as the lower jaw, might remain numb for a longer period. Your individual metabolism, age, and overall health also influence how quickly your body processes and eliminates the numbing agent.
Tips for Faster Numbness Dissipation
Several approaches may help accelerate sensation return by increasing blood flow to the affected area, aiding anesthetic metabolism. Gently massaging the outside of your cheek or lips can stimulate circulation; use clean hands and avoid pressing directly on the injection site. Engaging in light physical activity, such as a brisk walk, can also boost overall blood flow, helping your body process the anesthetic more quickly. Always confirm with your dentist if light exercise is appropriate for your specific procedure.
Applying a warm (not hot) compress externally to the numb area can help dilate blood vessels, increasing blood flow to the site. Staying well-hydrated by drinking water also assists your body in flushing the anesthetic out of your system. Gentle movements of your jaw, such as wiggling it slightly, can further encourage circulation in the area.
In some cases, dentists may offer a reversal agent, such as phentolamine mesylate (OraVerse), which is injected to speed up the return of normal sensation. This medication works by increasing blood flow to the soft tissue, potentially cutting the numbness duration by about half.
Staying Safe While Numb
While your mouth is numb, take precautions to avoid accidental injury. Refrain from eating or drinking hot beverages until your sensation has fully returned, as you may not be able to feel the temperature and could burn yourself. It is also advisable to wait until the numbness subsides before eating solid foods to prevent accidentally biting your cheek, tongue, or lips.
The lack of sensation makes it difficult to detect such injuries, which can lead to painful sores. Regularly checking the numb areas for signs of injury, such as bite marks, can help address any issues promptly.
Contact your dentist if the numbness persists significantly longer than the expected duration, generally beyond four to six hours, or up to 24 hours depending on the anesthetic type.
You should also reach out to your dental office if you experience severe pain, swelling, discharge, difficulty moving your jaw or face, or any signs of an allergic reaction like a rash, itching, or breathing difficulties. Persistent tingling or burning sensations are also reasons to consult your dentist.