Swollen under arm and a knot/upper part of shoulder and chest area was swollen.; Nauseated; Real dehydrated; Kidneys started hurting and felt like kidneys were overworking; Mouth dry; Kept having to go to the restroom; Kept using restroom and had to pee a lot; He is a little sore, but the pain is not as bad; Pain in kidneys woke him up from sleep.; Arm is still swollen but swelling went down; red spot under his arm that looks irritated; This is a spontaneous report from a contactable consumer (patient). A 47-year-old male patient received bnt162b2 via an unspecified route of administration in upper right arm on 02Jan2021 between 07:00-07:30 at single dose for covid-19 immunization. Medical history: None. There were no concomitant medications. The patient experienced swollen under arm and a knot/upper part of shoulder and chest area was swollen on 03Jan2021 18:00, nauseated, real dehydrated, kidneys started hurting and felt like kidneys were overworking, mouth dry, kept having to go to the restroom; kept using restroom and had to pee a lot, he is a little sore, but the pain is not as bad, pain in kidneys woke him up from sleep all on 03Jan2021. Got COVID Vaccine on Saturday. Was swollen up under arm. Over kidneys, started hurting. Swelling went down. Took Naproxen and Ibuprofen. Mouth was really dry. Felt like kidneys are overworking. Keeps drinking water and going to the restroom. Kidneys started hurting. Received through work. Employed at a mental health and mental retardation school. Arm swollen with a knot. Got off Sunday morning, 03Jan2021. By 18:00, under arm was swollen. Thought he slept wrong or he had an issue with an artery. Under arm and into upper part of shoulder and chest area was swollen. He was nauseated. Felt really dehydrated. Kidneys started hurting. Felt like kidneys were overworking. Felt similar to when he previously had a kidney infection. Knew something wasn't right. Kept using restroom and had to pee a lot. Kept drinking. Kidneys were hurting from 03Jan2021 to yesterday. He is a little sore, but the pain is not as bad. Was drinking water, cranberry juice, and orange juice to flush the COVID vaccine through. Pain in kidneys woke him up from sleep. Is a little swollen. Pain is better than what it was. Between 02:00-03:00 it was done. Swelling was really bad. Start taking Naproxen and Ibuprofen. He was hurting too. Arm is still swollen but swelling went down. There is a red spot under his arm that looks irritated. Supposed to receive second COVID Vaccine on 30Jan2021 but was not going to take it. Clarified he took Naproxen with Ibuprofen in it for the anti-inflammatory. Confirmed he was only referring to one product.  Naproxen was just bought from the store. Unable to provide NDC/Lot/Exp because he does not have product at time of call. Formulation: 200mg per pill, took two pills then six hours later took another two for Voluntary; high number of COVID Cases at his work. Scared to take second COVID Vaccine. The patient underwent lab tests and procedures which included Covid Test: unknown results on an unspecified date (He has to take COVID tests twice a week). The outcome of events was unknown. Vaccination Facility Type: which is a mental health and mental retardation school. He has to take COVID tests twice a week. No additional vaccines administered on same date of Pfizer suspect. The event was not required a visit to doctor or other healthcare professional office/clinic or Emergency room/department or urgent care. Prior vaccinations within 4 weeks was none. Adverse event follow prior vaccinations was none. Relevant tests: none.  Information about Lot/Batch number has been requested.