Part of upper lip goes numb when I bite into food?

Hi everyone, About 3 weeks ago, I started having this weird thing happen. Every time I took that first bite into something (breakfast/lunch/dinner/etc), the area above my left front tooth on my lip would go numb for 2-3 seconds. This has been happening consistently since then. What could be the cause of this? I don't have any pain, and my last dental checkup/x-ray was fine. Any ideas? Tha... click here to continue

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