This is a spontaneous report from a Consumer or other non-health professional (patient). A 51-year-old male patient received bnt162b2 (PFIZER BIONTECH COVID-19 mRNA VACCINE, Solution for injection, Batch no: not reported/Lot Number: EN6202) via an unspecified route of administration in Arm Right on 31Mar2021 11:00 am (at the age of vaccination of 51-year-old) as dose 2, single for covid-19 immunization. Patient received bnt162b2 (PFIZER BIONTECH COVID-19 mRNA VACCINE, Solution for injection, Batch/Lot Number: EL9269) via an unspecified route of administration on 10Mar2021 11:00 as dose 1, single (at the age of vaccination of 51-year-old) for covid-19 immunisation and experienced with hives required ER visit, chills, Soreness at injection site, right arm lymph nodes were swollen and sensitive, tenderness under the arm. Medical history included covid-19, headache, crazy chills, cough and core body temperature was 2 degrees lower than normal all were from Dec2020 to an unknown date. The patient's concomitant medications were not reported. No Prior Vaccinations taken within 4 weeks, prior to vaccination. No AEs following prior vaccinations reported. Medical History including any illness at time of vaccination were reported as None. On 01Apr2021, patient experienced fatigue and on 09Apr2021, 9 days after first COVID vaccine on 31Mar2021 he began having delayed systemic hives at 12:00, the patient experienced itching hives really bad progressed quickly to anywhere on his body, his waist, chest, back all became itchy, his face, cheeks, back of neck developed hives as well and hives had spread to the bottom of wrist and then to both wrists. On 09Apr2021 at 10:30-11:00 Pm, patient experienced chills, uncontrollable shaking/ getting the shakes, bruises under arm, left back; and blood pressure was elevated and he reported that shaking chills on 09Apr2021 were similar to when had COVID virus in Dec2020. On an unspecified date in Apr2021, patient experienced itchy and location included halfway down his thighs, down to middle of his hip and around the backside was a little bit was red, inflamed and swollen. Caller reports itching hives really bad on both hands and progressed quickly to anywhere on his body where there was restricted clothing. He was told when he received the shot that if he started having a hive or allergic reaction go the emergency room and he visited the emergency room for hives because he was afraid it could be bad and he was itchy with hives all over. Caller stated that he was trying to figure out a way to report the symptoms he had, the emergency room dismissed it and caller does not believe that the emergency room will report his experience and he was told the symptoms were probably from laundry detergent. Patient visited ER for event Hives and no physician officed visited. No Investigation Assessment was reported. The patient underwent lab tests and procedures which included blood pressure measurement results 150/85 mmhg on 09Apr2021 the blood pressure was higher than normal and that at the doctor's office his BP normal was the 130s/mid 80s and at home his blood pressure is mid 120s/upper70s, sars-cov-2 test results negative for covid-19 on an unknown date in Dec2020. Treatment received for the experienced with prednisone 40mg taper, Prilosec as needed, and Benadryl as needed. Caller reports that he is taking 50mg of Benadryl at night, 25mg Benadryl in the morning and Prilosec twice a day. Outcome of itching hives really bad progressed quickly to anywhere on his body, his waist, chest, back all became itchy, his face, cheeks, back of neck developed hives as well and hives had spread to the bottom of wrist and then to both wrists and location included halfway down his thighs, down to middle of his hip and itchy was recovering, around the backside was a little bit was red, inflamed and swollen and blood pressure was elevated was unknown, outcome of chills and uncontrollable shaking/ getting the shakes was recovered on 10-Apr2021, outcome of fatigue was recovered on 05Apr2021; outcome of bruises under arm, left back was not recovered. The nurse practitioner who saw caller in the emergency room dismissed the possibility that the hives were from the COVID vaccine because it was 9 days prior on 31Mar2021.  No follow-up attempts are needed. No further information is expected.