I had hives all over my body, my legs, my arms, my face had, the hives were really popped out it was like almost pimples; They were really red, at one point they got popped out; chin was swollen, my eyelids were swollen; chin was swollen, my eyelids were swollen; I started getting rapid heartbeat; doctor said it could be the heart palpitation side effects from the vaccine; I got that rash back again on my cheeks; I ended up in the ER because I received a severe allergic reaction; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 23-year-old female patient received BNT162b2 (BNT162B2), on 02Sep2022 at 09:40 as dose 1, single (Lot number: FW1330) at the age of 23 years, in left arm for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. The following information was reported: HYPERSENSITIVITY (medically significant) with onset 03Sep2022, outcome "unknown", described as "I ended up in the ER because I received a severe allergic reaction"; RASH (non-serious) with onset 06Sep2022, outcome "unknown", described as "I got that rash back again on my cheeks"; HEART RATE INCREASED (non-serious) with onset 07Sep2022, outcome "unknown", described as "I started getting rapid heartbeat; doctor said it could be the heart palpitation side effects from the vaccine"; URTICARIA (non-serious), outcome "unknown", described as "I had hives all over my body, my legs, my arms, my face had, the hives were really popped out it was like almost pimples; They were really red, at one point they got popped out"; SWELLING FACE (non-serious), SWELLING OF EYELID (non-serious), outcome "unknown" and all described as "chin was swollen, my eyelids were swollen". The events "i ended up in the er because i received a severe allergic reaction", "i had hives all over my body, my legs, my arms, my face had, the hives were really popped out it was like almost pimples; they were really red, at one point they got popped out", "chin was swollen, my eyelids were swollen", "i started getting rapid heartbeat; doctor said it could be the heart palpitation side effects from the vaccine" and "i got that rash back again on my cheeks" required emergency room visit. The patient underwent the following laboratory tests and procedures: Electrocardiogram: (unspecified date) Unknown results, notes: few days ago I went to the hospital and got EKG to check in on my heart; Heart rate: (07Sep2022) Rapid, notes: rapid heartbeat. Therapeutic measures were taken as a result of hypersensitivity, urticaria, swelling face, swelling of eyelid, rash.  Clinical course: Patient received the first dose of the Pfizer vaccine on September 3rd. September 4th in the morning, ended up in the ER because received a severe allergic reaction. Patient had hives all over my body, my legs, my arms, my face had, the hives were really popped out it was like almost pimples. They were really red, at one point they got popped out. Patient chin was swollen, eyelids were swollen. Well, patient wanted to report that and make sure that they release it to the public because this is clearly why didn't want to get the vaccine. Patient had to get it because of my job and the reason why they want to get it is because was scared of this reaction and that is the first thing that happened to me. When paraphrased the concern, Consumer stated, Yes, hives all over my body. Patient was given the option to take the second dose and perhaps in a hospital where can get monitored but the time for that is not until December. So, patient know that there is other people waiting in line that are also in the same situation because they got a reaction from it (general statement)and patient don't think it is right that is happening should not end up with public. Patient never got monitored after 15 minutes of vaccine and just got taken out of the office. No prior vaccinations (within 4 weeks). Patient received the vaccine on the second, went to the ER on the third and sixth and seventh got that rash back again on my cheeks and starting the 7th of September Patient started getting rapid heartbeat and have still been like that random heartbeats and doctor said it could be the heart palpitation side effects from the vaccine as well and am bringing that up because few days ago patient went to the hospital and got EKG to check in on heart. Treatment in response to adverse event, patient stated, When went to the ER, they prescribed Benadryl and Steroids. No Other Conditions. No other product.