What Causes A White Patch Under The Tongue?
Some possibilities.
Detailed Answer:
Hi -
I couldn't really see the white spot well because of reflection, although in mouth3.jpg I could see a white patch toward the left side under your tongue.
It looks like a sore from a small trauma to the mucus membrane that is now in the healing phase, but I can't tell for sure from the picture.
Given that this followed use of antibiotics, it's possible that it a small area of oral candidiasis (thrush). I can't know for sure from the pictures - it should be seen in person. Usually oral candida causes what looks like a white patch. If this is the case, treatment is an oral anti fungal such as Nystatin 4-6 ml, swish and swallow 4 times per day. Clotrimazole is another option.
If you don't smoke cigarettes, chew tobacco, or use tobacco in any other form, the chance of this being something serious such as cancer of the mouth is very low.
Leukoplakia, is another possibility. It can cause a whitened area from recurrent irritation. Treatment is to remove the irritation (such as if something is rubbing there).
So I think the thing to do at this point is go back in to be seen. If your primary doctor can't tell, then the next step is an ENT. And if you can't get in to see an ENT, a dentist may provide information and you might be able to get in to see one sooner.
I hope this helps.
About aphthous ulcers
Detailed Answer:
An aphthous ulcer is just a canker sore. It doesn't look like a canker sore, which usually has more of a crater appearance - white in the central crater surrounded by red inflammation.
It's possible that it started out as a canker sore, but is now healed over.
2nd dentist.
Detailed Answer:
Hi - I can understand being worried, but the chance of it being cancerous is very low without tobacco use. Also, that it came on after a viral infection makes it less likely too - is more likely to be related to that or the antibiotic use. Also, I think a physician who has been in practice for 40+ years is reassuring as he has likely seen pretty much everything.
Seeing a 2nd dentist is a good idea, but try to put your mind at ease if you can as the chance of it being something serious is very low.
I'd be reassured by this.
Detailed Answer:
If it were me, I'd be reassured by the second dentist and the physician with 40 years experience who saw the white area in person. It may be a healing, or healed, mucosal irritation or have been a canker sore that is healing or healed.