It keeps purely going numb and the lining peel away if i scratch at it (which i come across to be addicted to doing for some reason).

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Answers:    Several things could cause you this blistering.
First, I would like to mention herpes simplex viral infection to be precise usually harmless. It could be also some fungal infection.
If this is a travel case that some antifungal oral medication should relieve your symptoms.
Even change of toothpaste could be the trigger for this crumbling.
But I must mention that this could be also a sing of some sexually transmitted disease so paying a visit to your doctor could be crucial for setting the right diagnosis.

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your falling apart

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