headache; Sore the injection site; 3.5-4 red hot rash that is swollen between her shoulder and her elbow; 3.5-4 red hot rash/red spot that is swollen between her shoulder and her elbow; severe pain under her armpit with some redness; severe pain under her armpit with some redness; red hot rash that is swollen between her shoulder and her elbow; fever; The armpit and the injection site has a huge red area, that bright red and hot; At the injection site, she has 3.5 to 4 inch bruised, red spot; between my shoulder and my elbow and between that, the whole thing is red and really hot; This is a spontaneous report from a contactable Nurse (patient herself). A 71-year-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Lot Number: EN6203), via an unspecified route of administration in Left arm on 02Oct2021 (71-year-old at vaccination) as Dose 3, Single for Covid-19 immunization. The patient's medical history included migraine, blood cholesterol. The patient's concomitant medication included omeprazole DR (delayed release), propranolol 40 mg (once a day) taken for migraine, lamotrigine taken for migraine (100 mg in the morning and 50 mg in the evening), paroxetine 20 mg a day as nerve medication (further not clarified), rosuvastatin 10 mg, once a day taken for blood cholesterol, low dose Bayer's aspirin (she wasn't prescribed by, just taking it on her own once daily (strictly precaution) she further mentioned heart problem (something wrong with heart). The patient was not related to a study or programme. The patient previously received bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE), via an unspecified route of administration on unspecified date as (first dose) Dose 1, Single and (second dose) Dose 2 and Single, both doses for Covid-19 immunization. She stated that, she was retired LPN, and she got the booster dose of the Pfizer BioNTech Covid 19 vaccine on Saturday (02Oct2021). On Sunday (03Oct2021), her symptoms begun when she woke up. She reported severe pain under her armpit with some redness, but that it was improving. She does mentioned that it hurts if she touches it. She had her other symptom, which was a 3.5-4 inch bruised, red hot rash/red spot that was swollen between her shoulder and her elbow, in the middle hot circle that doesn't go completely around her arm, but almost. She was concerned that it was so large and hot. She had a little bit of redness in her armpit and the pain in her armpit was severe. She had bad headache and sore the injection site and then, but this was Tuesday (05Oct2021) her armpit on that side, she had the injection, that was the worst above the symptoms. It was so bad. She had a huge area/large red part area, the huge area around the injection site it halfway between her shoulder and her elbow and between that, the whole thing was red/redness into her armpit and actually the worst pain and really hot. It's red under her armpit and because that's weird, still hurt but nothing like it. She was concerned about this red area. It's probably about apparently four inches height and around and it goes almost around her armpit, not to the way but it was most of the way around her armpit. She used ice when ache and Ibuprofen. She also had fever as well. The patient underwent lab tests and procedures which included blood test resulted unknown and body temperature was unknown on an unknown date. The outcome of events severe pain under her armpit wish some redness was not recovered, fever was recovering, and the outcome of all other events was unknown.  Follow-up attempts are completed. No further information is expected.