Swelling; felt like it was burning; Dry skin; up all night on 06Feb2021, and could not sleep; Back started itching so bad; Entire torso, from chin to waist, front and back, covered in rash; just like prickly rash; Extremely sore arm, lasted for about 3 days; Headache; Nauseous, but never threw up; This is a spontaneous report from a contactable consumer (patient). A patient of unspecified age and gender received the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE; lot number: EK9231 and expiry date: unknown), via an unspecified route of administration from 19Jan2021 at a single dose for COVID-19 immunization. The patient's medical history and concomitant medications were not reported. Patient got the first COVID-19 shot on 19Jan2020 and by the second day on 20Jan2021, patient had an extremely sore arm which lasted for about 3 days. The second (20Jan2021) and third day (21Jan2021), had a headache and was nauseous but never threw up. By the fourth day, everything was fine and patient have been fine. Yesterday afternoon on 06Feb2021, patient's back started itching so bad and was around the house doing things and felt why the patient itching so bad, it must be dry skin. After an hour, patient went into the bathroom and raised the shirt and saw the back was getting red and it was itching and felt like it was burning. In about 2 hours time, patient's entire torso, from chin to waist, front and back, was covered in a rash just like a prickly rash. Patient was up all night long and can't lie down because when if the patient lies down, the heat, pressure was applied. Patient called a druggist and was told to get some Benadryl until patient can get some more information. Patient took Benadryl and 'see its study last night' (not clarified appropriately) and at 12:30 in the morning of 07Feb2021, this did help with the itching. All night long, patient could literally feel this rash popping out on arms and my legs. Patient was completely covered from chin, neck, torso and all four limbs. At the time of report, patient did not have any of it and had not have itching but was able (incomplete sentence). Patient was up all night on 06Feb2021, and could not sleep because patient could not lie down and could not sit against anything because the heat, it made it worse. Patient got an appointment on the morning of 07Feb2021, in one of the clinics and they did a complete work up and asked all kinds of questions about allergies and having been in contact with other things or change in the lotions or perfumes or towels or sheets or new clothes and there was nothing. There was absolutely nothing that has changed in the patient's life, it just started yesterday on 06Feb2021. So, physician gave two different prescriptions and told patient to try put some cold compresses on it because of the swelling and the itchiness and try to get in the coolest shower, and to start the meds. Patient have taken them one time and was told that if there was no good change in a day or two, to go to the regular Primary Care Doctor for him to do other work. Physician immediately said that sometimes, she said it sounds crazy but she says sometimes if you got 'stray up' (not confirmed), even though you don't have a sore throat. 'Stray up' can sometimes breathe you out in a rash that is like 'fallout' fever, 'fallout' fever rash (not clarified).Outcome of the event of sore arm, headache was recovered while for remaining events was unknown.