the pain is migrating towards legs; describes the pain in her back as spinal acute myelitis in which it affects the nerves; Starting to mess up kidneys; The caller's kidneys are starting to hurt also.; On the second day, 17Dec2021, the caller almost passed out.; The caller doesn't know has to go to bathroom and all a sudden feels nothing just comes.; next day she started sweating really bad; After receiving booster dose vaccine back started hurting/ Felt like ripping spine out of body, like just pulling spine out.; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team for a Pfizer sponsored program (159558). The reporter is the patient.  A 57 year-old female patient received bnt162b2 (BNT162B2), administered in arm right, administration date 16Dec2021 16:00 (Lot number: FD7218, Expiration Date: 28Feb2022) at the age of 57 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "Asthma" (ongoing), notes: Has had asthma since the patient was young or little; "COVID-19", start date: 03Feb2021 (unspecified if ongoing); "pretty sick" (unspecified if ongoing), notes: pulmonologist said the patient should get the vaccine because the patient was pretty sick. Concomitant medication(s) included: XOLAIR taken for asthma (ongoing). Began taking 7 years ago, takes Xolair shots every other week. Vaccination history included: Bnt162b2 (lot: EW0153, Route of administration: right arm), administration date: 05Apr2021, when the patient was 56 years old, for COVID-19 immunization; Bnt162b2 (lot: EW0167, route of administration: right arm), administration date: 06May2021, when the patient was 57 years old, for COVID-19 immunization. The following information was reported: MYELITIS (non-serious), outcome "unknown", described as "describes the pain in her back as spinal acute myelitis in which it affects the nerves"; BACK PAIN (non-serious) with onset 16Dec2021 18:00, outcome "not recovered", described as "After receiving booster dose vaccine back started hurting/ Felt like ripping spine out of body, like just pulling spine out". The patient states that her spine feels like it did when she had COVID; RENAL DISORDER (non-serious) with onset 17Dec2021, outcome "unknown", described as "Starting to mess up kidneys"; PAIN IN EXTREMITY (non-serious), outcome "unknown", described as "the pain is migrating towards legs"; RENAL PAIN (non-serious) with onset 17Dec2021, outcome "unknown", described as "The caller's kidneys are starting to hurt also."; PRESYNCOPE (non-serious) with onset 17Dec2021, outcome "unknown", described as "On the second day, 17Dec2021, the caller almost passed out."; URINARY TRACT DISORDER (non-serious) with onset 17Dec2021, outcome "unknown", described as "The caller doesn't know has to go to bathroom and all a sudden feels nothing just comes."; HYPERHIDROSIS (non-serious) with onset 17Dec2021, outcome "unknown", described as "next day she started sweating really bad". The patient provided that she has consulted with her HCP yesterday and they plan to prescribe her IV steroids, run blood work, and have an MRI next Thursday. The patient states this was pretty serious.  No follow-up attempts are possible. No further information is expected.