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The views expressed by me are for educational purposes only and do not establish a doctor patient relationship.
I am Mysticdoc, experienced Internal Medicine Specialist.
I am here to help you with your concerns.
This is likely a bacterial infection of the canker sore.
This is causing worsening pain and swollen lymph node.
so go get antibiotics or let it go away on its own
Lichen planus does increase the risk of bacterial infection.
Hence, you need a course of antibiotic like Augmentin for 7 days.
This may get worse without antibiotic.
Unfortunately, this one does require doctor's visit fo antibiotic.
Should get better within a week with antibiotic.
ok very well.