site began to, a little bit of blood began to come out at the site; so intense that little bit blood came out at the site; site began to hurt; the site began to hurt; I had a quick hot flash fever, a quick fever of the hay; quick hot flash fever; hay fever/a quick fever of the hay; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A female patient received BNT162b2, BNT162b2 omi ba.4-5 (BNT162B2, BNT162B2 OMI BA.4-5), on 09Feb2023 as dose number unknown (booster), single (Lot number: GJ6743) for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. Vaccination history included: Covid-19 vaccine (Primary Immunization Series Complete; Unknown Manufacturer), for COVID-19 immunization. The following information was reported: HOT FLUSH (non-serious) with onset 02Apr2023, outcome "unknown", described as "I had a quick hot flash fever, a quick fever of the hay"; SEASONAL ALLERGY (non-serious) with onset 02Apr2023, outcome "unknown", described as "hay fever/a quick fever of the hay"; PYREXIA (non-serious) with onset 02Apr2023, outcome "unknown", described as "quick hot flash fever"; VACCINATION SITE HAEMORRHAGE (non-serious) with onset 02Apr2023, outcome "unknown", described as "site began to, a little bit of blood began to come out at the site; so intense that little bit blood came out at the site; site began to hurt"; VACCINATION SITE PAIN (non-serious) with onset 02Apr2023, outcome "unknown", described as "the site began to hurt". The events "site began to, a little bit of blood began to come out at the site; so intense that little bit blood came out at the site; site began to hurt", "the site began to hurt", "i had a quick hot flash fever, a quick fever of the hay", "quick hot flash fever" and "hay fever/a quick fever of the hay" required emergency room visit. The patient underwent the following laboratory tests and procedures: Body temperature: (02Apr2023) fever.  Additional information: Patient stated that she went to the emergency room where actually helped her come in contact with a little hive, she had COVID or whatever and she didn't know (no further clarifications) I was always seeing. She got her Pfizer shot on 09Feb2023 at (name withheld) and she really had adverse reaction that she reported it recently within the last two weeks of adverse reaction that she had. It was because something happened when she was at the library and the site began to, a little bit of blood began to come out at the site. Whatever was so intense that little bit blood came out at the site. This morning (02Apr2023), within the last 2 hours, the site began to hurt so she thought that's what the doctor was talking about, when the doctor said "have you been around anybody who has Covid" and this person, she didn't know what they were doing there or what happened but the site, the same area where the Covid shot is or was, it's like it was an impact whatever it was it reacted this morning so she didn't know what Pfizer is supposed to do so she acted to let Pfizer know. This was what she noticed, she was really unsure what she needed to know and what to do because she got a new baby, a newer baby, her son is being raised by his father but she had to go to general area at the time of this report. Because she had to go in the general area, she was very concerned what was it that she was supposed to do because she had let the hospital know that she had a reaction from some days ago and so she was letting Pfizer know that she had a reaction. That site had a reaction this morning from someone that was there. She had a site reaction and that was in February, it was April at the time of this report. It had not been two months, its less than two months. At the time of this report, patient was at the hospital. She stated that it appeared that she had a quick hot flash fever, a quick fever of the hay. She had hay fever, this lasted real longer like really quick.   No follow-up attempts are possible. No further information is expected.