Fear of pain, or of the numbing not working
Fear that treatment will hurt — or that local anaesthetic will not work for you — is common and can be planned around.
Approved by Dr Rob Endicott
Last reviewed September 2026
General information, not personal medical or dental advice.
Two different fears
Some people fear pain itself. Others specifically fear that the anaesthetic will not work on them — sometimes because of a past experience where treatment continued while they could still feel it. Both deserve to be taken seriously.
Local anaesthetic is used to prevent pain, but past experiences of incomplete numbing deserve to be discussed. Ask how the dentist will check the area before treatment and what they will do if you feel discomfort.
You are allowed to check before treatment starts
You can ask the dentist to explain how they will check the numbness before treatment. Agree a stop signal so you can ask to pause if you feel discomfort or need a break.
If you have had a bad experience with numbing
Tell the team what happened. The dentist can assess the situation and explain the appropriate options. ‘It did not work well before’ is useful information for planning; it does not by itself determine what will happen next time.
Things you can try
- Write down exactly what happened last time numbing felt insufficient, and share it with the dentist before treatment.
- Agree a stop signal and a 'test first' plan before anything starts.
- Ask what the plan is if the first anaesthetic is not enough — knowing there is a plan B reduces the fear.
Sources
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- Fear of dental injections
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- Feeling out of control — and how a stop signal gives it back
Lying back in the chair while someone works in your mouth can feel like handing over all control. Simple agreements with the team hand it back.
- After a previous bad dental experience
A frightening or painful past experience can make later dental visits feel unsafe. A calm, patient-controlled approach may help you take another step.
If you have dental pain, swelling, an injury or bleeding, seek dental advice now — do not wait. This guide is general information and does not replace care from a dentist, doctor or mental-health professional.