she can still see red marks; Rash on arms, rash on both legs, rash on belly, rash on face; This is a spontaneous report from a contactable consumer (patient herself) via Team. A 52-year-old female patient received BNT162b2 (PFIZER BIONTECH COVID-19 mRNA VACCINE, Solution for injection, Lot number- EN6203) via an unspecified route of administration in right arm 15Mar2021 16:30 as 1st dose, single (at the age of 52-years-old) for COVID-19 immunization. Vaccine was not administered at Facility. Patient medical history included uterine cancer. She did know when it started, they suspected it in June. Because she had anaphylactic shock they were not able to complete the biopsy. They confirmed it in 16Nov2020 with a biopsy and she had a total hysterectomy on 30Nov2020. Ongoing multiple drug allergies, she was diagnosed with some of the allergies, it would have been back in 2013. Probably they started in 2013 that they figured out she had drug allergies. She is also allergic to a lot of other medications. Rare heart attack from 2013, she had 3 stents placed. She had multiple drug allergies. She went into anaphylactic shock because of Cephalosporin in Jun2020. The concomitant medications included ongoing acetylsalicylic acid (BABY ASPIRIN) at a dose of 81 mg from 2013 , which she started taking it after having a rare heart attack, ongoing amlodipine besilate at a dose of 10 mg from May2020 for hypertension, she became allergic to ACE's and ARBs so she was started on amlodipine, Ongoing atorvastatin calcium (LIPITOR) from 2014, which she has been taking it for years for cholesterol. Patient received her first Pfizer BioNTech Covid 19 vaccine on 15Mar2021. On Sunday (28Mar2021) patient experienced a rash that only occurred when she was active. Patient received the Covid-19 Vaccine approximately 2 weeks ago on 15Mar2021. This Sunday (28Mar2021), she started having rashes. They are localized rashes. They started first on both of her legs, then they dissolved, but then they come back later. Today (30Mar2021) the rash was on her arms, belly, legs, and face. For the rash on her belly, she can still see red marks but it is not as crazy inflamed as they were. She clarifies the rash on her face started yesterday (29Mar2021) cleared up then came back again this morning (30Mar2021). Her face has improved from the angry red rash it was this morning. She clarified she went into anaphylactic shock and cardiac arrest. She woke up in the ICU with a tube down her throat because they put her in a coma, and they kept telling her she needed a bigger hospital so maybe it was not the best hospital to have a reaction at. That was the main reason she wanted to get the Covid vaccine because she did not want to end up back there.  It turned out once that reaction happened they did not know why, they were not sure what happened because they were preparing her for surgery. So, she had gone to an allergist and received extensive drug allergy testing. She was told her they believed they were able to get all of the cancer with the hysterectomy and they did not think the cancer went anywhere else. For the first year she would had to be checked 3 or 4 times to make sure there is not a reoccurrence. She believed as of now she was technically considered cancer free. Because she had extensive allergies, she tried Benadryl which did not seem to have any effect maybe because it was expired. She tried Calamine lotion because the burning can be fairly intensive when the rash first started. The rash on her legs started on Sunday (28Mar2021) at about 10. The rash on her arms recently started again today (30Mar2021). She clarified the rash on her right arm started when she got up around 08. Then, the rest of the rashes on her face, stomach, and legs, started once she got going walking the dog. She could start to feel a prickly feeling (that comes with a rash). So she said by 09:00 the other rashes on her stomach, legs, and face started. When she walked in from the walk, her husband noticed she had not had those when she left but did when she came back. She thought it was something to do with the outside but now it seemed it was when she moved, it seemed activity made the rash come out. The adverse events did not result in emergency room visit, she had an appointment at physician office on Wednesday (31Mar2021). Description of product complaint included because she had extensive allergies, patient tried Benadryl (Expiration Date- Dec2019) for multiple rashes and it did not seem to have any effect. The outcome of the event rash was not resolved and that of erythema was unknown.   Follow up attempts are needed. Further information has been requested.