This is the third time in the last few months I have had this problem.Did get a phone appt with doctor who said oral thrush and prescribed medicine I took and finished a week ago...I will have to phone again...not sure if it is that. my inside lips are so blistered , my tonguefeels huge and it hurts to swallow. I used dr google and after discounting syphilis first option - it looks like herpes simplex ......I am widowed and live alone - no human contact since start of lockdown.i just feel so fun down with it all.