When Does Numbing From The Dentist Go Away?


Visiting the dentist can be a scary experience for many people, especially when it involves painful procedures. Dentists use local anesthesia to numb the area where they will be working to provide pain relief. But the question is, how long does the numbing effect last? In this article, we will discuss when numbing from the dentist goes away.

The Duration of Numbing

The duration of numbing varies depending on the type of anesthesia used, the amount administered, and the individual patient’s metabolism. Generally, the numbness lasts for 2-4 hours, but it can last up to 8 hours. The duration of numbing also depends on the location of the injection. Numbing in the lower jaw lasts longer than in the upper jaw.

Factors That Affect the Duration of Numbing

Type of Anesthesia

The type of anesthesia used affects the duration of numbness. There are many types of anesthesia, including lidocaine, prilocaine, articaine, and bupivacaine. Each has a different duration of action.

Amount of Anesthesia Administered

The amount of anesthesia administered also affects the duration of numbness. Dentists usually administer the minimum amount needed to provide pain relief. However, if the procedure is more extensive or painful, they may need to administer a larger dose of anesthesia, which can prolong the numbness.

Individual Patient’s Metabolism

Every person’s metabolism is different, which means the duration of numbness can vary from person to person. Some people metabolize anesthesia faster than others, which shortens the duration of numbness. On the other hand, some people metabolize anesthesia slower, which prolongs the numbness.

How to Reduce Numbness

If you are experiencing prolonged numbness, there are a few things you can do to reduce it. Firstly, avoid eating or drinking anything hot or cold as you may not feel the temperature properly, which can result in burns or other injuries. Secondly, avoid biting your tongue or cheeks as you may not feel any pain. Lastly, be careful when driving or operating heavy machinery as you may not have full control over your movements.

When to Contact Your Dentist

If the numbness lasts longer than 8 hours, or if you experience any other unusual symptoms such as swelling or bleeding, contact your dentist immediately. These symptoms may indicate an infection or other complications that require immediate attention.


In conclusion, the duration of numbness from the dentist varies depending on several factors. Generally, the numbness lasts for 2-4 hours, but it can last up to 8 hours. If you are experiencing prolonged numbness or any other unusual symptoms, contact your dentist immediately. Remember to take extra precautions to avoid any injuries during the period of numbness.