Severe allergic reaction; all his back was red; pain; felt like his throat was getting really raspy/ felt like his throat was about to close; tried to drink water and couldn't even pass (swallow) it; body rash all over the body, it was itching and itching/ itching and itching, got the rash on arm escape, inside arm, belly, penis, inside legs, body in the back everywhere; This is a spontaneous report from a contactable consumer (patient) reported for himself that a 46-year-old male patient received first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, lot number: EW0150) at the age of 46-years, via intramuscular in left arm on 17Apr2021 at single dose for COVID-19 immunisation. Medical history included enlarged prostate; gout; anxiety. Concomitant medications included medication for diet; prostate medication because his prostrated was enlarge; medication for gout and anxiety. Patient stated that he got injected with COVID-19 the Pfizer shot and they gave him like side effects, pain. He was experiencing one of the severe allergic reactions. The body rash all over the body, it was itching and itching. He didn't know what to take with it. He mean he called the health department, they told him to take diphenhydramine hydrochloride (BENADRYL) but he mean what can remove this bad rash all over the body. If he did what they need to give him because he spoke to a COVID-19 nurse and was told that no reverse on the vaccine. There was nothing you can take to reverse the effect. He stated that he took vaccine on 17Apr2021, and on 20Apr2021, after three days later, had broke down with rashes. When probed for ongoing of the side effects, patient stated that of the vaccine, yes, he was itching and itching, got the rash on his arm escape, inside his arm, belly, penis, inside legs, body in the back everywhere, all his back was red. He mentioned that his doctors told him to take diphenhydramine hydrochloride, it was over the counter for allergy. They said you have to take that but the doctor, the health department told him that didn't work, may be take the steroids shot but patient spoke to another doctor they told him that steroids shot was not recommended. As of 03May2021, patient stated that he went and got the first dose and 3 days later, he broke out in a rash. Then, on Friday, 30Apr2021, he felt like his throat was getting really raspy. He thought "well, let me get some water". He tried to drink water and couldn't even pass (swallow) it. He felt like his throat was about to close. He drove himself to the Emergency Room and was given a steroid shot. He confirmed he had rash and itchiness all over his body 3 days after receiving the first dose, clarifies starting on 20Apr2021. The patient was only seen in the ER and was not admitted into the hospital. He was given a steroid shot that was supposed to be for the feeling of his throat closing up and for any type of rashes and stuff like that. He confirmed he was also given an intravenous dose of diphenhydramine hydrochloride 50mg. However, he was still itchy. The patient underwent lab tests and procedures, which included weight was 260-270lbs. Blood work on 30Apr2021 was normal. Outcome of the events was unknown.