occurs only of soft labile mucosa of oropharyngeal areas only. it cant occur on Jaw bones or ear. Alternatively, it can lead at maximum to pain in all these areas.
You haven't mentioned about your tobaccoo history that is smoker or non smoker?
Headaches, enlarged lymph nodes, inability to open the mouth ahve multiple reasons behind them. Kindly seek a second opinion
from an oral surgeon regarding the same.
Canker sores are having multiuple reasons behind it, most often cited includes Vitamin B12
Defeciency, STRESS, Streptococcal bacterial infections, Autoimmune/ allergic reactions, and Iron defecienceis. .
It can be well treated by,
a) gargle with warm water mixed with one capsule of RESTICIlLLIN-250mg (Tetracycline
b) Take Vit. B Complex Caps at night with Milk (For Iron/ Vit B defeciency correction)
c) Apply Dologel CT on affected sores
d) Maintain Good Oral Hygeine (Brush twice and use mouthwashes)
and Lastly you can have Amoxicillin
antibiotics three times a day for three days