rash around the body/rash all around body was reported as worsened.; sore throat/sore throat was reported as worsened; sweating; shaking; weakness; pain around the kidney; Pain around back; muscle pain in his back; a little scared.; This is a spontaneous report from a contactable consumer (patient). A 51-year-old male patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE), dose 1 via an unspecified route of administration, administered in Arm Left on 29May2021 (Batch/Lot Number: FW0187) as 1st dose, single for COVID-19 immunization. No medical history and concomitant medication were reported. The patient experienced the following symptoms: weakness on 29May2021, pain around the kidney on 29May2021, muscle pain in his back in 2021, sweating on 29May2021, shaking on 29May2021, rash around the body on 30May2021/rash all around body was reported as worsened and sore throat on 30May2021/sore throat was reported as worsened, a little scared in 2021, pain around back on 29May2021. Clinical course: A couple hours after the first vaccination, he started to feel weakness and pain around his kidney and back part. Also, some symptoms that are very common. He felt sweating and shaking and stuff like that. That night he noticed he started to have a rash all around his body and day by day it has been getting worse. On 01Jun2021, he went to the hospital emergency room and they gave him some medicine. He received a shot of diphenhydramine hydrochloride (BENADRYL) in the hospital. They also gave him an IV to flush out his body. Then the doctor gave him three prescriptions. He was released from the emergency room yesterday as well. 1. Aluminium hydroxide gel, dried, magnesium carbonate (PEPCID) 20 mg Expiration- Nov2022 in a pharmacy bottle, No lot number; 2. diphenhydramine hydrochloride (generic one) 25mg Expiration- Nov2023 in a pharmacy bottle, no Lot number; 3. Methylprednisolone tablet 4mg (NDC: 68001-005-01; Lot number: 20P0432, Brand: Bluepoint). Dose details: 6 days- First day to take 6 together, second day to take 5 together, fourth day to take 4 and so on for 6 days. So far, he has just taken the first dose which is 6 together. When he woke up today, he noticed that his rash was even worse. He didn't know how far the rash will go. The rash was like a burn and watery. The rash was all around his body. It started on his head; under his head and all around his face, then stomach, back and legs. His primary doctor and the emergency doctor suggested for him to not get the second dose because the second dose of BNT162B2 was going to have a stronger reaction. Some event details described as follows: weakness: Experienced 5 hours after receiving the shot. Considering how it has worsened his daily activities, from zero to 10, was like a 4. Pain around kidney: Like a muscle pain around kidneys that started about 8-10 hours after the shot. That pain came and went. It's not that much pain but still with him. Zero to 10 is like a 4 or 5 on pain level. Pain around back: pain was like a muscle pain. He experienced this 10 hour after vaccine. The pain has sort of improved. It was almost resolved. Sweating: He experienced on first night. 12 hours after. It came and went, but still ongoing. It was not that much, but still he still had it. Shaking: He experienced this on same night as the sweating. 12 hours after. It was almost recovered. It has happened one or two times over the past two days. Rash all around body: He noticed this a day after his shot. It was a couple of them around his body. It started from his head and spread all around body, but it was not that much at first. Day by day it has been getting worse and today is the worst day so far. The emergency room doctor checked his kidneys just in case. They told him everything was fine with the kidneys. It seems like it is a problem with the muscle. Also, he had a sore throat. It started 3 days ago. When he drinks or eat something, he felt burning. He noticed it the first time at nighttime. The emergency room doctor is assuming he had a vaccine reaction. Reporter seriousness for events weakness, pain around kidney, pain around back, sweating, shaking, rash all around body and sore throat was provided as unspecified. The outcome of event muscle pain in his back and a little scared was unknown; of event shaking and pain around back was recovering; of rest events was not recovered.