about 1+ hours ago, she came down with a massive headache; it as a "bright, red, rashy and blotchy"/her (left) arm was bright red with a (blotchy) rash (across her left arm); it was "hot as hell"/her (left) arm was hot as hell; She had a blotchy rash across her left arm; She had injection site soreness for 3 days after receiving her first COVID-19 Vaccine; couldn't move her arm at all; left arm was a little tender to move; This is a spontaneous report from a contactable nurse (patient). A 60-year-old female patient received the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE), via intramuscular in left arm on 27Apr2021 (lot number: EW0171) at single dose for COVID-19 immunization. The relevant medical history included ongoing multiple allergies, ongoing peanut allergy, ongoing reaction to sulfites (sulfites in wine gave her a headache), ongoing reaction to preservatives (She said she would become anxious & then turn bright red & become short of breath. She said sometimes her tongue would turn pale & white looking & she would faint. She said she carried Benadryl with her & the Benadryl took care of her reactions. She said Benadryl had been her "MO" for treating reactions. She said the doctors don't want to give her an EpiPen unless her reaction is a documented as an anaphylactic reaction) and sensitive to the epinephrine (used in dental treatments caused her to become short of breath, and faint). Concomitant medications included potassium acetate from Apr2021 and ongoing for an unspecified indication. The patient previously took Benadryl from unspecified date to treat her peanut allergy and won't help her allergic reaction to peanuts; also took Benadryl from unspecified date for reaction to preservatives. The patient said that 8 days after the injection, she experienced a massive headache and the left arm where she received the vaccine had a red "circle" around the injection site. She described it as a "bright, red, rashy and blotchy" and said it was "hot as hell". She explained her son and husband were vaccinated right after her, by the same person, and they didn't develop anything. She explained she thought her reaction was due to the preservative in the vaccine as she had a lot of allergies. She expressed her concern about potentially developing anaphylaxis to the second dose of the vaccine after her reaction to the first. She asked for the risk associated with taking the second dose of the vaccine after such reaction to the first. The nurse furtherly reported that about 1+ hours prior to the report (clarified as the time of the report, 06May2021), she came down with a massive headache. She said her husband brought her home something for her headache. She said her (left) arm was bright red with a (blotchy) rash (across her left arm). She said her (left) arm was hot as hell. Reported she had a hesitation to take the COVID-19 Vaccine because she had a lot of allergies to begin with, but nothing that caused an anaphylactic reaction. On 27Apr2021, she had injection site soreness for 3 days after receiving her first COVID-19 Vaccine and her left arm was a little tender to move at that time, but not as bad as after receiving a TB (vaccine) shot. She said after the TB vaccine shot, she couldn't move her arm at all. She reported her symptoms came out of nowhere, and she believed her headache and left arm rash were directly related to the COVID-19 Vaccine. She said her son and husband went immediately after her for their COVID-19 Vaccines, and had the same exact person administer the COVID-19 Vaccine. She said neither her son, nor husband, had a reaction from the COVID-19 Vaccine. No further details provided. The events did not require a visit to Emergency Room or Physician Office. Treatment for headache included 1 Extra Strength Tylenol 500mg caplet. Treatment for left arm blotchy rash included a cold compress on her left arm. She said she also took Benadryl (clarified as Walgreens Children's Dye Free liquid "Wal-Dryl" Diphenhydramine). She said she preferred to use the children's liquid Diphenhydramine because when she had a reaction, sometimes her throat felt like it was swelling. The outcome of the event left arm was a little tender to move and couldn't move her arm at all were recovered on an unspecified date, for event injection site soreness for 3 days after receiving her first COVID-19 Vaccine was recovered in Apr2021, while the other events were not recovered.; Sender's Comments: Based on known drug safety profile, there is reasonable possibility of causal association between the events headache, Vaccination site erythema, Vaccination site warmth, and Vaccination site rash and the suspect drug.  The impact of this report on the benefit/risk profile of the Pfizer product is evaluated as part of Pfizer procedures for safety evaluation, including the review and analysis of aggregate data for adverse events. Any safety concern identified as part of this review, as well as any appropriate action in response, will be promptly notified to regulatory authorities, Ethics Committees, and Investigators, as appropriate.