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A 36-year-old member asked:

Why would i have jaw stiffnes and pain weeks after i had a novocain (procaine) shot during at my dentist?

3 doctor answers3 doctors weighed in
Dr. Jonathan Engel
Dentistry 40 years experience
Many reasons: Depending on the injection that was used, the needle may have passed through multiple muscles and you might be having a muscle spasm. You might have kep your mouth open for a long period of time and the muscles might be angry from that. You might have an issue with the filling and not be aware of it. I would call your dentist and have them see you as soon as you can get it in.
Dr. Michael Teitelbaum
Dentistry 33 years experience
Shot location?: Could be where the shot was, if it made the muscle sore, or if you had your mouth open too long and made it sore.
Dr. Steve Tassone
Cosmetic Dentistry 34 years experience
Possible Hematoma: Soreness could be due to a hematoma, a common side affect of local anasthetic administration. It is like a bruise and usually gets better with time. If not better within several weeks, go back or get 2nd opinion.

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