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Can you submit a picture of the bump/lesion?
alright, one moment as I look into the images.
Has it always been this size, or is it ever larger ?
Well first to clarify why your dentist and oral surgeon aren't telling you what it is, is because most oral lesions can only be truly diagnosed with a biopsy. So if they aren't concerned about it, the last thing they want to do is concern you with confusing words of differential diagnosis and biopsy (the word) always seems to worry people. So it being on the lateral border of your tongue, and the coloration that I see would likely be a hyperkeratotic lesion. Basically a taste bud with a callous. The lateral border of the tongue comes into the bite line often and can get a fibrous tissue consistency especially if landing on a papilla (taste bud). If this area was to continue to get more firm in texture and you were routinely injuring it, it would be best just to have the area lasered/removed. It appears very superficial and has no concerning red and white combination colors which is good when determining lesion origin. I would do your best not to bite the area because it will keep returning and more noticeable the more you do it. Does that make sense and answer your question?
Nope it doesn't seem suspicious. It's good to be aware of your oral tissues, so continue to self-monitor and ask for follow-up about it with your dentist at your regular check-ups.
Thanks and take care!