This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP and Other HCP) from medical information team. The reporter is the patient. A 51 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 09Feb2021 (Lot number: EM9808) at the age of 51 years as dose 1, single for Covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. The following information was reported: EPIPHYSIOLYSIS (non-serious) with onset Feb2021, outcome "unknown", described as "Experienced peeling in her mucosa"; ANTINUCLEAR ANTIBODY POSITIVE (non-serious) with onset Feb2021, outcome "unknown", described as "ANA screen and it was positive"; TONGUE EXFOLIATION (non-serious) with onset Feb2021, outcome "unknown", described as "Has a constant feeling of peeling in her mouth and it irritates her tongue and is sensitive"; STOMATITIS (non-serious) with onset Feb2021, outcome "unknown", described as "has a constant feeling of peeling in her mouth and it irritates her tongue and is sensitive"; DYSPHAGIA (non-serious), SOMNOLENCE (non-serious) all with onset Feb2021, outcome "unknown" and all described as "Caller states she had a hard time swallowing anything and was really groggy". The events "experienced peeling in her mucosa", "ANA screen and it was positive", "has a constant feeling of peeling in her mouth and it irritates her tongue and is sensitive", "has a constant feeling of peeling in her mouth and it irritates her tongue and is sensitive", "caller states she had a hard time swallowing anything and was really groggy" and "caller states she had a hard time swallowing anything and was really groggy" were evaluated at the emergency room visit. Relevant laboratory tests and procedures are available in the appropriate section. Additional Information: She experienced peeling in her mucosa. It started after she received the vaccine. Almost immediately. She has done alot before calling Pfizer. she has gone to Urgent Care, Ear Nose and Throat Physician, a dentist, and a Rheumatologist. She had a diagnostic test called ANA screen and it was positive, but she can't find or pinpoint to what it was caused from. She has a constant feeling of peeling in her mouth and it irritates her tongue and is sensitive. The health care professionals she has been to can't figure it out, but she knows it began right after she received her first dose of the Pfizer COvid-19 Vaccine. HCP Occupation/Specialty: ENT. She states she has a question and was not sure this was something we have heard about or not. States she had the Pfizer Covid-19 vaccine and has had this constant peeling in her mouth. Relays that originally she didn't think it was the vaccine, she thought it was a paste or something she used or ate. States she was seen in emergency care and they didn't find anything. States she saw ENT as it was still going on and had gone to a few doctors. States she thought she would see the time line and if it coincides with the vaccine and it does. States she has gone to see urgent care, ENT, dental, oral pathology and a rheumatologist and they can't find anything. States she was AHA positive but nothing else was showing, nothing major to be concerned of. States the peeling in her mouth has not stopped since she got the 1st vaccine, it's just there and it's irritating. States after going to a lot of things and before she goes for a biopsy she wanted to see if we had heard anything like this, was it something we think could be a side effect of the vaccine. States she was more concerned now she knows there was a booster coming. Patient was asking would this cause even more issues once she gets the booster. States why she thinks it was vaccine related was she got it 09Feb2021 and went to urgent care on 23Feb2021 and before that she was having issues going on in her mouth and she didn't know what to do. States that come Friday it was just horrible. States she was told to wait 2 weeks and maybe she had something and they tested her for Covid was all they did which makes sense since they are an urgent care. States then she tried a few things in 2 weeks. Relays on 01Mar2021 she had her 2nd vaccine and it was again irritating a week after she went to ENT and he looked at it and could see, right now it was not as visible, he could see a lot of white mucous in there and gave her steroids. States she took that for 2 and a half weeks the complete dose and even after that she didn't see any difference in there. States it was dexamethasone liquid .5mg and she rinsed 4 times a day for 2 weeks. Patient does not have lot or expiry to provide as it doesn't say on the note and she doesn't have the bottle anymore. States she started taking it either 05May2021 or 06May2021. States her ENT then said to go check with dental and oral pathology and around the time she started to realize the vaccine and looked at the dates and that just may be a coincidence but it started right after the 1st vaccine she took. Prescribing Healthcare Professional Info: ENT was who prescribed the medications. Vaccination Facility Type; Hospital. Description of Product Complaint: dexamethasone liquid .5mg and she rinsed 4 times a day for 2 weeks. Patient does not have lot or expiry to provide as it doesn't say on the note and she doesn't have the bottle anymore. States she started taking it either 05May2021 or 06May2021. Relays on 01Mar2021 she had her 2nd vaccine and it was again irritating a week after she went to ENT and he looked at it and could see, right now it is not as visible, he could see a lot of white mucous in there and gave her steroids. States she took that for 2 and a half weeks the complete dose and even after that she didn't see any difference in there. No follow-up attempts are possible. No further information is expected.