idk: I could not open the link (asked for a password), but in any event, any kind of mouth sore that does not heal within 2 weeks should be checked by an ENT (Ear, Nose and Throat specialist), preferably one who is an ENT/Surgeon.

That way you will find out for sure if it is anything to worry about, and you can ease your mind that it really is a "chronic irritation". and if it is, keep an eye on it for any changes.

good luck.

DX 12/6/10 of T3 SCC Tongue.
Surgery 1/3/11 was hemigloss & forearm free flap, midline mandibulectomy, Neck Disection-All nodes clear.
Ended rads 5/11/11. Taste buds back to about 80%. PEG removed 4/5/12, experimenting eating real food again. If I can do this, so can you !! Stay Strong.