She is nervous; Immense pain/Aches; She has migraines anyway but felt severe pain shoot through the back of her head; Within 15 minutes she had a flush; twitch; Throat swelling up; Her blood pressure was very high; Her right leg and that started and lasted through the night and stopped; Aches and joint pain and stuff; Her left breast had chest pain; This is a spontaneous report from a contactable consumer. A 53-years-old female patient received bnt162b2 (COMIRNATY), dose 1 via an unspecified route of administration, administered in Arm Right at 53 years old on 01Oct2021 10:24 (Batch/Lot Number: 30145BA) as DOSE 1, SINGLE for covid-19 immunisation. Medical history included ongoing fatty liver disease, ongoing enlarged uterus, ongoing enlarged uterus, food allergy to pork and red meat. Concomitant medication included cetirizine hydrochloride (ZYRTEC [CETIRIZINE HYDROCHLORIDE]). The patient stated that her 1st dose of the Pfizer COVID vaccine was administered on Friday 01Oct2021 and the shot caused weird side effects and she was nervous. On 01Oct2021. The patient experienced pain began as soon as she got the shot and immediately before she got up from the chair and it was very unexpected and was intense pain for probably a minute and then a sense of pain stayed with her for a while. After the 1st dose of the vaccine, she immediately felt pain go through her head and she has migraines anyway but felt severe pain shoot through the back of her head and then it stopped; states within 15 minutes she had a flush.  The patient stated that the pain has resolved, and she has not felt it since and the flush began the same time period but close to the time where her 30 minutes was up because she had to sit there due to her food allergy. The patient was trying not to freak out and eventually her left side started to twitch a little bit like when your throat wants to swell up and when it stopped it was like a cold swelling in the back that happens with the food allergy and it usually occurs after the allergy. The flush came about 15 minutes after the shot and when the flush happened, she felt warm go through her like when you get a cat scan and feel the dye go through all the way; states the flush lasted 15 minutes and she does not remember when the twitching began on her left side but it started feeling weird and they got a doctor and her blood pressure was very high. stated she had no other vaccines the same date as the Pfizer COVID vaccine and avoids things; states she brought Benadryl with her to take to help counteract if this started and took the Benadryl while she was sitting there and they made her wait 20-30 minutes; states she has the new box of the Benadryl she took and does not have an epi-pen they told her to get. The next couple of days after the vaccine she felt fine and did not feel sickly or anything and on Sunday morning she had deep pain in her right leg and that started and lasted through the night and stopped; states for the next week or so when she would sit down in a rocking chair or the couch she would go out and was not tired but would go to sleep and would be knocked out; states she woke up and it felt like she had been asleep for days and does not know if it was covid itself working on her. On Wednesday night after the shot, that night was the worst night and she had aches and joint pain and stuff and got up the next morning and felt so bad and that whole day and figured this was the next part of it and then felt better; states on 15Oct2021 about 2 weeks after the shot she started feeling in her left breast had chest pain and it was really tough sharp and lasted through the weekend and started Friday and thought it was part of covid too and the antibodies were working and she expected it; states it probably has nothing to do with the vaccine and then she felt fine. Therapeutic measures were taken as a result of the events.