Painful; I am just getting over an outbreak now lasted 10 days; Oral ulcers and sores. Tongue lips and back of throat affected.; Oral ulcers and sores. Tongue lips and back of throat affected.; Oral ulcers and sores. Tongue lips and back of throat affected.; Oral ulcers and sores. Tongue lips and back of throat affected.; Oral ulcers and sores. Tongue lips and back of throat affected.; Oral ulcers and sores. Tongue lips and back of throat affected.; Oral ulcers and sores. Tongue lips and back of throat affected.; This is a spontaneous report received from contactable reporter(s) (Other HCP). The reporter is the patient.  A 66 year-old female patient (not pregnant) received bnt162b2 (BNT162B2), intramuscular, administered in arm left, administration date 21Aug2021 15:00 (Lot number: FF2588) as dose 3 (booster) , single, intramuscular, administered in arm left, administration date 12Jan2021 14:00 (Lot number: EL3248) as dose 2, single and intramuscular, administered in arm left, administration date 22Dec2020 13:00 (Lot number: EL1284) as dose 1, single for covid-19 immunisation. Relevant medical history included: "Psoriasis" (unspecified if ongoing); "psoriatic arthritis", start date: 1991 (ongoing), notes: Onset date: 30 Years, Pertinent details: On taltz biologic, when I was 30; "Weakened Immune System" (unspecified if ongoing), notes: Weakened Immune System:, Use of medication that suppress the immune system (e.g., high-dose of corticosteroids, cyclosporine, methotrexate, azathioprine, and biologic therapies like rituximab and etanercept). Concomitant medication(s) included: TALTZ taken for psoriatic arthropathy, stop date: Nov2021; FOLIC ACID, start date: Oct2021 (ongoing); METHOTREXATE taken for psoriatic arthropathy, start date: Oct2021 (ongoing). The following information was reported: MOUTH ULCERATION (non-serious), STOMATITIS (non-serious), TONGUE ULCERATION (non-serious), GLOSSODYNIA (non-serious), LIP ULCERATION (non-serious), CHEILITIS (non-serious), PHARYNGEAL ULCERATION (non-serious) all with onset 01Jan2021, outcome "not recovered" and all described as "Oral ulcers and sores. Tongue lips and back of throat affected."; PAIN (non-serious), outcome "recovered", described as "Painful"; CONDITION AGGRAVATED (non-serious), outcome "recovered", described as "I am just getting over an outbreak now lasted 10 days". The event "oral ulcers and sores. tongue lips and back of throat affected.", "oral ulcers and sores. tongue lips and back of throat affected.", "oral ulcers and sores. tongue lips and back of throat affected.", "oral ulcers and sores. tongue lips and back of throat affected.", "oral ulcers and sores. tongue lips and back of throat affected.", "oral ulcers and sores. tongue lips and back of throat affected." and "oral ulcers and sores. tongue lips and back of throat affected." was evaluated at the physician office visit. Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of mouth ulceration, stomatitis, tongue ulceration, glossodynia, lip ulceration, cheilitis, pharyngeal ulceration. No follow-up attempts are possible. No further information is expected.   Comments/Narrative: The patient have had & continue to have oral sores. Lips, tongue, gums, and back of throat have been effected. Usually starts at the corner of my mouth then inside lower lip, tongue, end with back of throat. Usually monthly or every other month. Last outbreak started 06Jan. Totally cleared up 12Jan. I'm now keeping track of these out breaks.  Follow-up attempts are completed. No further information is expected.