it seems to break out in my mouth like a blisters; keep coming up with thrush in my mouth; it doesnt stay away long I get it back; My mouth is like a piece of beefs so soar; keep coming up with thrush in my mouth; it doesnt stay away long I get it back; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 65 year-old female patient received bnt162b2 (BNT162B2), administration date 19Apr2021 (Lot number: ER8734) at the age of 64 years as dose 2 ,single for covid-19 immunisation. Relevant medical history included: "Diabetes mellitus" (unspecified if ongoing), notes: Verbatim: Diabetic; "Anxiety" (unspecified if ongoing), notes: Verbatim: Anxiety; "Allergies" (unspecified if ongoing), notes: Verbatim: Allergies; "gastric bypass to loose weight" (unspecified if ongoing), notes: I had the gastric bypass to loose weight. Concomitant medication(s) included: ALPRAZOLAM taken for anxiety; METFORMIN taken for diabetes mellitus; NOVOLIN R taken for diabetes mellitus; TRESIBA. Vaccination history included: Bnt162b2 (Dose 1, I had my first vaccine on 27Mar2021 and I did not have any problem.), administration date: 27Mar2021, when the patient was 64 years old, for Covid-19 Immunization, reaction(s): "I did not have any problem". The following information was reported: BLISTER (non-serious) with onset 2021, outcome "unknown", described as "it seems to break out in my mouth like a blisters; keep coming up with thrush in my mouth; it doesnt stay away long I get it back"; ORAL PAIN (non-serious) with onset 2021, outcome "unknown", described as "My mouth is like a piece of beefs so soar"; ORAL CANDIDIASIS (non-serious) with onset 2021, outcome "unknown", described as "keep coming up with thrush in my mouth; it doesnt stay away long I get it back". The event "it seems to break out in my mouth like a blisters; keep coming up with thrush in my mouth; it doesnt stay away long i get it back" was evaluated at the physician office visit. Therapeutic measures were taken as a result of blister, oral pain, oral candidiasis.  Additional information: Consumer stated, Well thought she should report it because it was ongoing thing now. She had her first vaccine on 27Mar21, and she did not have any problem. But then on 19Apr21 from thereafter and she even had the booster shot. It seems to break out in her mouth like a blisters, and she have gone to a specialist and she have gone to her local physician. It keep coming up with thrush in my mouth. She never had problem like this until she started with the Pfizer vaccine. So she think it should be reporting because it was been since the second shot. LOT: Consumer stated, I am not sure which number you need here. She have the clinic site. The LOT# would be withheld that was the second injection she had. Yes, and the doctor and the specialist diagnosed it with being thrush she have it again that was why she was concern. My mouth was like a piece of beefs so soar. (further not clarified). Expiration date: Consumer stated, 19Apr2021 when she had it. You mean when she was first get vaccinated again. 19Apr2021. Yes she had the first one in March. (further not clarified). Treatment: Consumer stated, Yes she have been taking a they gave me a wash that you wash your mouth out with and now she am going back on another pill again to try to get rid of it. But it did not stay away long she get it back and that was what she was about. Consumer was informed about the Regulatory Authority. Concomitant medication: Consumer stated, she was on a chair scale it started 4 and goes to 12. It depends on how high I am how much it was on she take with meal. It was an R for regular insulin. It was 100 units but she go on scale like say she was 100 to 150 she take 7. She go with scale until its 12. So sometime she can go high to 12 on the unit. (further not clarified). Consumer further stated, Oh she take Tresiba that was the time weak insulin that taken in the morning. It was an injection and that was the 100 units. It was a flex touch pen. And the injection that she take are 24. (further not clarified). Medical condition: Consumer stated, she had the gastric bypass to loose weight. (further not clarified). Prior Vaccine (within four weeks): Consumer stated, No.  No follow-up attempts are possible. No further information is expected.