Muscles will tense up; Fainting when standing for long periods of time; Shortness of breath; Chest tightness or pressure; Chest tightness or pressure; Chills; Has high blood pressure going along with the fainting; Headaches or migraines; Headaches or migraines; feeling really hot; unable to move fingers; lightheaded; feeling delusional; Unable to move, lack of mobility; Unable to move, lack of mobility; Unable to move fingers, hands will completely cramp up; Fever; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 26-year-old female patient received BNT162b2 (BNT162B2), in Jul2022 as dose 1, single (Batch/Lot number: unknown) at the age of 26 years for covid-19 immunisation. The patient's relevant medical history included: "mast cell activation syndrome" (unspecified if ongoing), notes: a food allergy caller has called mast cell activation syndrome, highly sensitive to foods. There were no concomitant medications. The following information was reported: PYREXIA (non-serious) with onset 2022, outcome "unknown", described as "Fever"; HYPERTENSION (non-serious) with onset 2022, outcome "unknown", described as "Has high blood pressure going along with the fainting"; HEADACHE (non-serious), MIGRAINE (non-serious) all with onset 2022, outcome "unknown" and all described as "Headaches or migraines"; MUSCLE SPASMS (non-serious) with onset 2022, outcome "unknown", described as "Unable to move fingers, hands will completely cramp up"; MOVEMENT DISORDER (non-serious), MOBILITY DECREASED (non-serious) all with onset 2022, outcome "unknown" and all described as "Unable to move, lack of mobility"; DELUSION (non-serious) with onset 2022, outcome "unknown", described as "feeling delusional"; FEELING HOT (non-serious) with onset 2022, outcome "unknown", described as "feeling really hot"; DIZZINESS (non-serious) with onset 2022, outcome "unknown", described as "lightheaded"; MUSCULOSKELETAL STIFFNESS (non-serious) with onset 2022, outcome "unknown", described as "unable to move fingers"; CHEST DISCOMFORT (non-serious) with onset Jul2022, outcome "not recovered", CHEST DISCOMFORT (non-serious) with onset Jul2022, outcome "unknown" and all described as "Chest tightness or pressure"; CHILLS (non-serious) with onset Jul2022, outcome "unknown"; SYNCOPE (medically significant) with onset Jul2022, outcome "unknown", described as "Fainting when standing for long periods of time"; DYSPNOEA (non-serious) with onset Jul2022, outcome "not recovered", described as "Shortness of breath"; MUSCLE TIGHTNESS (non-serious) with onset Oct2022, outcome "unknown", described as "Muscles will tense up".  Clinical summary: Consumer on the other line called to report side effects from the Pfizer BioNTech COVID-19 vaccine. Patient did not mention what side effects, just said having side effects. Received 1st primary dose, 4 months ago in early Jul2022. The patient does not know what formulation of the vaccine caller received, whether gray top or purple top and does not have vaccination card available at time of call. Had proof of 1st vaccination but does not have vaccination card at time of call but has a thing saying caller is vaccinated and that is scheduled to get 2nd dose. The patient was 26 years old when the side effects started and 27 years old now. Patient weight was about 125-128 pounds. Patient was reporting shortness of breath; chest tightness or pressure; fainting when standing for long periods of time; muscles will tense up, unknown what the word is, unable to move, lack of mobility, unable to move fingers, hands will completely cramp up; fever; and chills. Other Conditions was none, and Investigations was none. Shortness of breath started exactly 3 days after vaccination. Outcome of event was ongoing, comes and goes, an everyday symptom. Has gotten worse slowly over time. Chest tightness or pressure also started immediately, started 3 days after vaccination, combined with the shortness of breath. Fainting when standing for long periods of time was also immediate, doesn't know if related to standing per say, lightheaded, feeling delusional, and fainting was along with the shortness of breath and chest pain, fainting was one of the first side effects as well. It was also reported that it Fizzled out and then came back. Still ongoing, but not every day. Had high blood pressure going along with the fainting. After fainting 1st time, the fainting disappeared after a few months and then came back, had gone away and then fainting came back. Fainting had not gotten better but doesn't want to say the fainting has gotten worse. Regarding Muscles will tense up stated that unknown what the word is, but unable to move, lack of mobility, unable to move fingers, hands will completely cramp up and was reported as just started last week, it was ongoing, believed there are some symptoms patient was having that are triggering other symptoms. Believed muscles tensing up could be related to a food allergy caller has, thinks the food allergy is called mast cell activation syndrome, related to foods caller is highly sensitive too. Fever had been on and off, no specific days, fever had really picked up the past 3 or 4 days, will get a fever out of nowhere, feeling really hot, with headaches or migraines accompanying the fever, when fever and headaches or migraines happen caller also has high blood pressure, blood pressure will spike. Started around this week that the fever, headaches or migraines, and high blood pressure have picked up. Chills Started within the week, just being really cold, limbs are chilly, weird. Right now, does not currently have chills at present moment but had chills yesterday. Confirmed caller had a total of 1 dose of the vaccine. Probably won't get the 2nd dose and was supposed to get 2nd dose on 10Aug2022, so if the doses would be like 25 or 30 days apart, maybe received 1st dose somewhere between 08Jul2022 to 15Jul2022.Caller does not have vaccination card at time of call but has the information in an email somewhere. Indication was that patient wanted to go get EMT certified and had to be vaccinated, didn't want to get the vaccine but wanted to work in healthcare and eventually work in the ER as a tech and getting the vaccine was a requirement. Patient is really healthy normally. Declined to do vaccine supplemental form at this time.  The information on the batch/lot number for BNT162b2 has been requested and will be submitted if and when received.