Hi,
This happened to Martin, it went away but he also got thrush of the gum after the blisters. It was treated very quickly with anti biotics, but make sure you check and get a nurse o take a look.
Good luck, I hope you can get back to more solid foofs soon. But don't get disheartened it's slow process.
C

Girlfriend to Martin 49 years old at diagnosis
Diagnosed with SCC unknown primary June 2008.
Cancer found in single node Stage N2A (3 to 6cm).
Tonsilectomy 16th june, Radical modified neck dissection left side 30th june.
30 TX radiotherapy ended 9th October
First comparative study scan came back clear