Big Nosebleed; some weird heart burn stuff going on; He doesn''t normally get headaches; but he had one yesterday towards the left temple on his head; He was very drowsy on 06Feb2022; Caller states this usually happens when he is fatigued; the body kind of shook; He still does not feel the same; myocarditis; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 24 year-old male patient received bnt162b2 (BNT162B2), administration date 05Feb2022 (Batch/Lot number: unknown) at the age of 24 years as dose 1, single for covid-19 immunisation. Relevant medical history included: "Nosebleed" (unspecified if ongoing), notes: Verbatim: Nosebleed; "Palpitation" (unspecified if ongoing), notes: States he has had palpitations before, but yesterday did not feel like palpitations. The patient's concomitant medications were not reported. The following information was reported: MYOCARDITIS (medically significant) with onset Feb2022, outcome "unknown", described as "myocarditis"; HEART RATE INCREASED (non-serious) with onset 05Feb2022, outcome "unknown", described as "First night after his vaccine his heart rate was 49-50 while he was sleeping.  States that is quite high for him"; DYSPEPSIA (non-serious) with onset 08Feb2022, outcome "recovered", described as "some weird heart burn stuff going on"; HEADACHE (non-serious) with onset 08Feb2022, outcome "unknown", described as "He doesn''t normally get headaches; but he had one yesterday towards the left temple on his head"; FEELING ABNORMAL (non-serious) with onset Feb2022, outcome "unknown", described as "He still does not feel the same"; EPISTAXIS (non-serious) with onset 09Feb2022, outcome "unknown", described as "Big Nosebleed"; SOMNOLENCE (non-serious) with onset 06Feb2022, outcome "unknown", described as "He was very drowsy on 06Feb2022"; FATIGUE (non-serious) with onset Feb2022, outcome "unknown", described as "Caller states this usually happens when he is fatigued"; TREMOR (non-serious) with onset Feb2022, outcome "unknown", described as "the body kind of shook". The patient underwent the following laboratory tests and procedures: heart rate: (05Feb2022) quite high, notes: His heart rate was 49-50 while he was sleeping; (08Feb2022) creeped up, notes: about 10 beats per minute higher than normal. Therapeutic measures were taken as a result of dyspepsia.  Clinical Information: He wants to give some background on his health first. He had decent cardiovascular health. He mountain bikes and he is pretty well and pretty healthy. He keeps track of his health matrix and data. When he is sleeping his heart rate is usually 39 beats per minute and he states that is good as it means his heart does not have to work that hard. States that the first night after his vaccine his heart rate was 49-50 while he was sleeping. States that is quite high for him and he thought something was going on and his body wasn't recovering like it used to. States the first two days he didn't do anything. States he wanted to recover as much as possible. He was very drowsy on 06Feb2022 and slept for 12 plus hours and thought it was just his immune system recovering. He got heartburn after eating only black beans and vegetables as it was barely any grease in that food. He took some Tums; gummy Tums and felt better after that. states that today about 30 minutes ago, out of nowhere, he was sitting on his desk and got a big nosebleed. His friends in the medical field told him to keep his heart rate down for the first week due to the risk for inflammation and then states myocarditis is what his friends mentioned.  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.