No, internal bleaching generally does not require anesthesia.
Internal bleaching is a procedure performed on teeth that have undergone a root canal. Since the nerve has already been removed, the tooth is no longer sensitive to pain. The bleaching agent is applied directly to the inside of the tooth, and the procedure is usually quick and straightforward.
However, some dentists may apply a topical anesthetic to the gums to minimize any discomfort or sensitivity during the procedure. This is a precautionary measure to ensure patient comfort, but it is not always necessary.
While most cases do not require anesthesia, the specific circumstances may vary depending on the individual patient and the dentist's preference. It's best to consult with your dentist to determine if anesthesia is needed in your case.
