Dental & hEDS/HSD
Why Doesn't Local Anesthetic Work on Me at the Dentist?
None of us writing this are doctors. This page collects what the published research actually says about local anesthetic resistance in hEDS/HSD, so you have something concrete to bring to a dentist or doctor.
Needing extra shots of numbing agent at the dentist, or still feeling pain through a procedure that should be numbed, is a frustration a lot of hypermobile people report - and it turns out to be a documented, named feature, not something imagined or exaggerated.
The Hypermobility Link Behind Local Anesthetic Resistance
A 2023 retrospective study of 327 patients with hypermobile Ehlers-Danlos syndrome (hEDS) or hypermobility spectrum disorders (HSD), from an Italian reference center, recorded resistance to local anesthetic drugs as one of several additional mucocutaneous features tracked beyond the official diagnostic criteria. It was found in 34.74% of the cohort - roughly one in three patients.
The study did not test why this happens - it documented the finding, not the mechanism. It also did not distinguish between dental anesthetic specifically and local anesthetic used elsewhere (minor surgery, stitches), so this figure describes local anesthetic resistance broadly, not a dental-only statistic. Still, a documented rate of about a third is a real, specific number, not an anecdotal pattern.
Read more on the hub page
What Pain Treatments Are hEDS/HSD Patients Actually Using, and Do They Work?
What to do about it
If numbing has repeatedly failed to work for you, telling your dentist or doctor before a procedure - rather than after it has already failed - gives them the chance to plan for it: more time for the anesthetic to take effect, a different agent, or a higher dose within safe limits. Mentioning a hypermobility or EDS diagnosis (or suspected one) alongside this history is reasonable context, even though the exact mechanism connecting the two is not yet established.
Sources referenced on this page