lot of pain; getting chest pains last month again; pericarditis; gained a lot of weight; heart was weak; it is beating out of control / heart was beating fast and irregular; severe chest pain; Iam not well / Not feeling well; so sick; light headed; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the parent.  A 22-year-old male patient received BNT162b2 (BNT162B2), on 20Aug2021 as dose 1, single (Lot number: FD8448) at the age of 22 years, in arm for covid-19 immunisation. The patient's relevant medical history included: "Vitiligo" (unspecified if ongoing), notes: Kind of started developing vitiligo, developed 2 years ago, which is in the skin, doesn't know if autoimmune disease, but skin starts getting white bumps on it. Got vitiligo in school, say stress causes vitiligo a lot. There were no concomitant medications. The following information was reported: DIZZINESS (non-serious) with onset 2021, outcome "unknown", described as "light headed"; ILLNESS (non-serious) with onset 2021, outcome "unknown", described as "so sick"; MALAISE (non-serious) with onset Aug2021, outcome "unknown", described as "Iam not well / Not feeling well"; ASTHENIA (non-serious) with onset Aug2021, outcome "unknown", described as "heart was weak"; HEART RATE IRREGULAR (non-serious) with onset Aug2021, outcome "unknown", described as "it is beating out of control / heart was beating fast and irregular"; CHEST PAIN (non-serious) with onset Aug2021, outcome "unknown", described as "severe chest pain"; PERICARDITIS (medically significant) with onset 03Sep2021, outcome "unknown"; WEIGHT INCREASED (non-serious) with onset Sep2021, outcome "unknown", described as "gained a lot of weight"; DISEASE RECURRENCE (non-serious) with onset Jun2022, outcome "unknown", described as "getting chest pains last month again"; PAIN (non-serious), outcome "unknown", described as "lot of pain". The events "it is beating out of control / heart was beating fast and irregular", "getting chest pains last month again", "so sick" and "light headed" required emergency room visit. The events "pericarditis", "severe chest pain", "iam not well / not feeling well", "gained a lot of weight" and "heart was weak" required physician office visit and emergency room visit. The patient underwent the following laboratory tests and procedures: test: (03Sep2021) Pericarditis; Weight: (Sep2021) Patient had gained a lot of weight, notes: Patient had gained a lot of weight when he had the pericarditis. Therapeutic measures were taken as a result of pericarditis, weight increased.  Clinical course: Reporter stated that it was very serious. This happened last august. I have been paying so many bills from this and I haven't done anything yet but Iam getting buried right now. There must be some kind of help fund or something to help out. Because its not my fault that he was forced to get the vaccine. The caller is a caregiver to her 22-year-old son. I want to tell you what happened to my son. Patient had the Pfizer vaccine. My son had a physical before he went to school and everything was great. Patient was an athlete, Patient eats really good. Everything was great. Patient had the Pfizer vaccine before he went to school because it was required and a few days after it he had severe chest pain. Patient said "mom I feel like I need an armor on my chest, Patient heart was so weak, it is beating out of control and irregular, light headed, really sick, wasn't leaving room. So he was in school when this happened and Patient never does it but he went to the Emergency room. They did all this tests and everything and he came out with pericarditis, and they said it was probably from the vaccine that they are getting a lot of so sick. They said patient had to stay in for a month and he was not allowed to work out and he was freaking out. It caused a lot of distress. and then patient started getting chest pains last month again. I had to take him to another cardiologist. So we had two occurrences. The bills are getting out of control for me right now my insurance told me to call you and tell you. This was his first vaccine. Patient had his 1st dose of the vaccine and a few days later started with severe pain in chest. Patient referred that his heart was weak and patient was not feeling well. Went to the emergency room, after all tests were performed on patient, patient was diagnosed with pericarditis, this was in Aug2021. Caller stated that last month the patient started with chest pain again. Caller also mentioned the patient was so sick and that it was a lot of distress for the family. Patient lost whole graduation, 2 months, a lot distress for patient. Patient height: Guess would be around 6 feet 3 inches. Patient weight: Unknown. Patient had gained a lot of weight when he had the pericarditis, but now watches weight, now exercises and on medications. Doctor didn't want patient to exercise when this happened because patient didn't feel well. Never was heavy before all of this happened, was an athlete. Patient was in a lot of pain and then after doctor didn't want patient working out, didn't really want patient going out because was in college, wanted patient to take it easy, patient was really not well for a while. Physician advised the patient to not get the next dose of the vaccine for work, because patient was going to work at places where patient would have needed to get the vaccine. Was hard in school, couldn't do the work, freaking out, because was going to school to graduate that year and was having so much work at school that patient wasn't able to do. Was supposed to have the 2nd dose of the vaccine but caller did not let patient get a 2nd dose. Went to the emergency room, after all tests were performed on patient, patient was diagnosed with pericarditis: Caller clarified that the patient went to the emergency room 03Sep2021. The severe pain in chest, heart was weak, and not feeling well, started coming on a few days after getting the vaccine, before patient went to the emergency room, but kept getting worse, became intolerable so then patient went to the emergency room. Been to hospital a few times for follow ups after going to the emergency room. Confirmed patient was never admitted to the hospital. Patient was afraid and thought maybe medications will help. Patient was extremely healthy, very athletic, in great shape, working out, cardio, played tennis, golfing, was running, basketball, soccer player. Ever since this happened patient has not been that athletic, afraid of heart. History of all previous immunization with the Pfizer vaccine considered as suspect was none. No additional accines administered on same date of the pfizer suspect. Prior vaccinations within four weeks prior to the first administration date of the suspect vaccines was none, AE(s) prior vaccinations, Patients Medical History (including any illness at time of vaccination) and Patient relevant tests was reported as none.