Post Root Canal: Persistent Lip Numbness and Tooth Pain Concerns - Dentistry

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Numbness of the lips after root canal treatment?


Hello, I experienced discomfort in my teeth while eating, so on April 22, I went to Clinic A, where the doctor performed a root canal treatment.
However, that evening, I felt numbness in my lips and severe tooth pain.
The medication provided by the clinic didn't seem to help much, but using ice packs offered some relief.
My lips remained numb, and I continued to use ice packs while sleeping until I fell asleep.
On the morning of April 24, I woke up in pain and had to find Clinic B, which was open on the weekend.
The doctor at Clinic B suggested that the worsening condition might be due to smoking or inadequate cleaning during the initial treatment.
They performed another nerve extraction and prescribed medication.
Although the pain has lessened, my lips are still numb, and I also feel discomfort when swallowing food.
What should I do?

Mr. Hsu, 40~49 year old female. Ask Date: 2016/04/24

Dr. Huang Zhicheng reply Dentistry


Hello, based on the above situation, if you are experiencing numbness in your lips, it may be due to the filling material being too long after a root canal treatment.
Since you have already visited a second clinic, please maintain good oral hygiene and refrain from smoking.
The symptoms of lip numbness may not improve immediately and can take six months to a year to recover.
If your discomfort does not decrease, it is advisable to visit a hospital for further evaluation.
Wishing you safety and health.
Sincerely, Dr.
Huang Chih-Cheng, Director of Dentistry, Taoyuan Hospital, Ministry of Health and Welfare.

Reply Date: 2016/04/24

More Info


Post root canal treatment, experiencing persistent lip numbness and tooth pain can be concerning and frustrating. It’s important to understand the potential causes of these symptoms and the steps you can take to address them.

First, let’s discuss the numbness in your lip. Numbness can occur after dental procedures, particularly those involving the lower jaw, due to the proximity of dental nerves. During a root canal, the dentist may inadvertently irritate or damage the nerves in the area, leading to temporary or, in some cases, prolonged numbness. This can happen if the anesthetic used during the procedure affects the nerve or if there is swelling in the area that puts pressure on the nerve. In most cases, this numbness resolves on its own, but it can take time, sometimes weeks or even months.

The persistent tooth pain you are experiencing could be attributed to several factors. After a root canal, it is not uncommon for the tooth to feel sore or tender for a few days as the surrounding tissues heal. However, if the pain is severe or does not improve, it may indicate that the root canal was not completely successful. This could be due to residual infection, incomplete cleaning of the root canals, or even a fracture in the tooth that was not detected during the initial treatment.

Given that you sought a second opinion and underwent a re-treatment, it’s crucial to follow up with the dentist who performed the second procedure. They may recommend further imaging, such as X-rays or a cone beam CT scan, to assess the condition of the tooth and surrounding structures. This can help identify any issues that may have been missed during the initial treatment, such as additional canals or hidden fractures.

In terms of managing your symptoms, here are a few recommendations:
1. Pain Management: If over-the-counter pain medications are not providing relief, consult your dentist about stronger prescription options. It’s essential to address any underlying infection or inflammation that may be contributing to your pain.

2. Follow-Up Care: Keep all follow-up appointments with your dentist. They will monitor your healing process and make necessary adjustments to your treatment plan.

3. Avoid Irritants: If you smoke, consider reducing or quitting, as smoking can impede healing and exacerbate dental issues.

4. Oral Hygiene: Maintain good oral hygiene to prevent further complications. Gently brush and floss around the affected area, but avoid putting too much pressure on the tooth until it feels more stable.

5. Dietary Adjustments: If swallowing is uncomfortable, try soft foods and avoid very hot or cold items that may exacerbate sensitivity.

6. Monitor Symptoms: Keep track of any changes in your symptoms. If the numbness persists beyond a few weeks or worsens, or if the pain becomes unbearable, seek immediate dental care.

In conclusion, while it’s common to experience some discomfort and numbness after a root canal, persistent symptoms warrant further investigation. Your dental health is paramount, and addressing these concerns with your dentist will help ensure the best possible outcome. Remember, communication with your dental care provider is key to navigating these post-treatment challenges effectively.

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