sore arm/arm was achy; headaches; muscle ache; she "couldn't move" it; area was shinny with the little bumps; hypochondriac; difficulty breathing; developed "blister bumps" on her "back, between her shoulders close to [her] neck/another "blister 2 inches" below the initial ones, on her back; when she scratched it and "clear liquid came out/oozed out of it/a clear liquid in it; it was "red, itchy and burning as acid"; it was "red, itchy and burning as acid"; it was "red, itchy and burning as acid"; This is a spontaneous report from a contactable consumer (patient). A female patient of an unspecified age received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Batch/Lot number: not reported, Expiry date: not reported), via an unspecified route of administration on 12Mar2021 as dose 1, single for covid-19 immunisation. The patient medical history was not reported. The patient's concomitant medications were not reported. On an unspecified date, the patient experienced sore arm/arm was achy, headaches, muscle ache, she "couldn't move" it, area was shinny with the little bumps, hypochondriac and difficulty breathing. On 13Mar2021, developed "blister bumps" on her "back, between her shoulders close to [her] neck/another "blister 2 inches" below the initial ones, on her back, when she scratched it and "clear liquid came out/oozed out of it/a clear liquid in it, it was "red, itchy and burning as acid". Caller stated she received the first dose of the bnt162b2 vaccine last Friday (unspecified date). She explained she had "a sore arm, headaches, and muscle ache", but they all "gone". She described her "arm was achy and said she "couldn't move" it. She added last night (before day of reporting) she developed "blister bumps" on her "back, between her shoulders close to [her] neck". She explained when she scratched it and "clear liquid came out/oozed out of it". She mentioned it was "red, itchy and burning as acid". She explained she put "hand sanitizer" on it and it relived her symptoms. She then said she asked someone to take a picture of the area and she noted the "area was shinny with the little bumps". She added she woke up this morning with another "blister 2 inches" below the initial ones, on her back". She specified it also: "itches and has a clear liquid in it". She mentioned her daughters who were nurses said she was hypochondriac, and she should only go to the ER as she has difficulty breathing. She asked what should she do, if the blisters were reported as side effect to the vaccine, if her reaction to the second dose will be worse than the first and if she should put alcohol/hand sanitizer on the second spot where she has a blister. She mentioned she had an appointment with her HCP this coming Tuesday (unspecified date). Caller asked if she should pursue with the second dose of the bnt162b2 vaccine given her reaction to the first dose. Therapeutic measures were taken as a result of the events developed "blister bumps" on her "back, between her shoulders close to [her] neck/another "blister 2 inches" below the initial ones, on her back, when she scratched it and "clear liquid came out/oozed out of it/a clear liquid in it, it was "red, itchy and burning as acid". The outcome of the events she "couldn't move" it, developed "blister bumps" on her "back, between her shoulders close to [her] neck/another "blister 2 inches" below the initial ones, on her back, when she scratched it and "clear liquid came out/oozed out of it/a clear liquid in it, it was "red, itchy and burning as acid" (pruritus), it was "red, itchy and burning as acid" (skin burning sensation), area was shinny with the little bumps, hypochondriac, difficulty breathing was unknown while the events sore arm/arm was achy, headaches, muscle ache, it was "red, itchy and burning as acid" (erythema) recovered on an unspecified date.  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.