oxygen was going down/oxygen was down to low 80s; got gum recession from it, that is how bad they were swollen from it; head hurt; Sore gums; Toothache; his eyes he has to focus a bit to see; his whole body was swelling so bad that he could feel his body, organs, skull, and neck was so bad; when he lay down he could hear crackling and popping in his skull; couldn't sleep; inflammation; Dry mouth; heart rate would go up; shortness of breath; blood pressure 130/95; he always feels worn out.; heart palpitations; my symptoms came back worse; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 32 year-old male patient received bnt162b2 (BNT162B2), administered in arm, administration date 14Nov2021 (Lot number: FH8030) at the age of 32 years as dose 1, single for covid-19 immunisation. Relevant medical history included: "COVID-19", start date: Jul2021 (unspecified if ongoing), notes: I had COVID-19. I been described as a long hauler.; "Blood pressure high", start date: Jul2021 (unspecified if ongoing); "Heart palpitations", start date: Jul2021 (unspecified if ongoing), notes: Heart palpitations; "heart rate was up", start date: Jul2021 (unspecified if ongoing), notes: heart rate was up. There were no concomitant medications.  The following information was reported: OXYGEN SATURATION DECREASED (hospitalization) with onset Nov2021, outcome "unknown", described as "oxygen was going down/oxygen was down to low 80s"; HEADACHE (non-serious) with onset Nov2021, outcome "unknown", described as "head hurt"; GINGIVAL PAIN (non-serious) with onset Nov2021, outcome "not recovered", described as "Sore gums"; TOOTHACHE (non-serious) with onset Nov2021, outcome "not recovered", described as "Toothache"; VISUAL IMPAIRMENT (non-serious) with onset Nov2021, outcome "not recovered", described as "his eyes he has to focus a bit to see"; SWELLING (non-serious) with onset Nov2021, outcome "unknown", described as "his whole body was swelling so bad that he could feel his body, organs, skull, and neck was so bad"; HEAD DISCOMFORT (non-serious) with onset Nov2021, outcome "unknown", described as "when he lay down he could hear crackling and popping in his skull"; INSOMNIA (non-serious) with onset Nov2021, outcome "unknown", described as "couldn't sleep"; INFLAMMATION (non-serious) with onset Nov2021, outcome "unknown", described as "inflammation"; DRY MOUTH (non-serious) with onset Nov2021, outcome "unknown", described as "Dry mouth"; GINGIVAL SWELLING (non-serious) with onset Dec2021, outcome "not recovered", described as "got gum recession from it, that is how bad they were swollen from it"; HEART RATE INCREASED (non-serious) with onset 2021, outcome "unknown", described as "heart rate would go up"; DYSPNOEA (non-serious) with onset 2021, outcome "unknown", described as "shortness of breath"; BLOOD PRESSURE INCREASED (non-serious) with onset 2021, outcome "unknown", described as "blood pressure 130/95"; FATIGUE (non-serious) with onset 2021, outcome "unknown", described as "he always feels worn out."; PALPITATIONS (non-serious) with onset 2021, outcome "unknown", described as "heart palpitations"; SYMPTOM RECURRENCE (non-serious) with onset 2021, outcome "unknown", described as "my symptoms came back worse". The patient was hospitalized for oxygen saturation decreased (start date: Nov2021, hospitalization duration: 3 day(s)). The patient underwent the following laboratory tests and procedures: blood pressure measurement: (2021) 130/95; heart rate: (2021) go up; oxygen saturation: (Nov2021) down to low 80s., notes: his oximeter would say his oxygen was down to low 80s. Therapeutic measures were not taken as a result of visual impairment. Therapeutic measures were taken as a result of dry mouth.  Clinical Course: Patient got his first dose of the Pfizer BioNTech COVID-19 vaccine adult formulation (purple cap) on 14NOV2021 and within 10 days of receiving the vaccines, his symptoms came back worse. His doctor even wrote something down about an adverse reaction, he classified it as an auto-immune response as well and he even wrote an exemption from work to get the second dose of the Pfizer BioNTech COVID-19 vaccine adult formulation (purple cap) due to this adverse reaction. Regarding treatment it was stated as there was nothing he can do for his eyes, but for his dental health he brushes his teeth and keeps his mouth moisturized because he has dry mouth as well don't know dry mouth caused it, but none of this was going on before the vaccine. He says his gums are uncomfortable, it all started the last day before Thanksgiving, then for about a week he had these and was out of work an entire week. He clarifies he got off from work on Wednesday and started feeling it, then Thanksgiving night it got really, really bad. He says he has even got gum recession from it, that is how bad they were swollen from it. He says he was hospitalized at the end of 29Nov or 30Nov, and he was there three days. He says he couldn't sleep, when he tried to lay down he had bad swelling to his neck and his heart rate would go up, and he had shortness of breath. He says he had his oximeter on at home when he would try to sleep for about a half hour and his oximeter would say his oxygen was down to low 80s. Stated the only thing that really bothers him still are his gums and teeth, and a little his eyes, those are a little off, and he always feels worn out.  No follow-up attempts are needed. No further information is expected.