Is it normal to have a headache after dental numbing and what can I do about it?

Headaches after dental numbing are not very common, but they can happen. Occasionally, dental procedures can be a cause of craniofacial pain. Over-the-counter pain relief like acetaminophen or ibuprofen might help.

Rarely, some people may experience adverse reactions to the medications used in dental anesthesia (such as lidocaine), which can include headaches. One rare but important example is acute toxic methemoglobinemia, which can be triggered by the injection of lidocaine and some other dental anesthetic medications. Methemoglobinemia affects the body's ability to use oxygen and can be life-threatening. For these reasons, if dental numbing leads to severe headaches (especially if other symptoms develop including trouble breathing, lightheadedness, and/or feeling very tired all of a sudden), it is very important to seek emergency medical care in case acute toxic methemoglobinemia is causing these concerning symptoms.

If these headaches persist or become severe, it is important to consult with a healthcare professional for a personalized medical evaluation and treatment plan. Remember, this information is for educational purposes and not a substitute for professional medical advice.