I don't believe I've ever had a blister in my mouth and I'm on this earth 8 decades soon. Again could be immune system and YES, I am paranoid about infection...it can and does happen and I had one on my leg from scratching it with my nails and when I went to derm he said "don't scratch with nails, they are dirty".... so that has stuck with me. I went thru a lot of creams for that one and finally steroids from the MD. It was not fun.
Nor was the knee infection, 4.5 months in hospital/rehabs as MD's didn't find the infection until they finally did an MRI, it was in the bones in the knee, and I can only think from the 5th Prolo injection I was getting....too bad I didn't stop at 4 injections but was doing so good so went for another one and it was the staph mess.
So yes paranoid about hands/nails in mouth or anywhere around the face. jam