Pressure in her spine/Feels like spinal fluid pressure/When she tries to look up, down, left, right, it feels like her spinal fluid is pressurized; like it is going to start shooting out; Tension in the neck and the back; Feeling bad/run down; Headache/ excruciating painful to turn my head look up and down; Difficulty swallowing; Increased pain with swallowing; Pain is not only in mid-upper back, its up to my brain stem area and then kinda goes to my scalp; Pain is not only in mid-upper back, its up to my brain stem area and then kinda goes to my scalp; When she "turns her head it fires, feels like a nerve fire or spasm and is very uncomfortable; Feels like cannot swivel head around, has to look with whole body; Weird, almost muscular pain sensation; Feels inflamed, almost swollen; My right like muscle around my eye were like twitching a lot; I have had like intrusive pressure it like it feels like my brain stem ever since, it just starts to really start getting hurt."; Feels inflamed, almost swollen; This is a spontaneous report from a contactable consumer reporting for self, from a Pfizer sponsored program with Regulatory Authority Support. A 39-years-old patient of an unspecified gender (reported as non-binary) received BNT162b2 (PFIZER-BIONTECH COVID-19 MRNA VACCINE), dose 1 via an unspecified route of administration, administered in left arm on 13Sep2021 (Batch/Lot Number: FE3592; Expiration Date: 30Nov2021) as dose 1, single dose (at the age of 39 years old), for COVID-19 immunisation. The patient's medical history was none. Concomitant medication(s) included estradiol (ESTRADIOL), 2 mg taken as hormone replacement therapy, start and stop date were not reported. There were no other vaccinations within four weeks prior to the first administration date of the suspect vaccine. Right after the vaccine (13Sep2021) the patient started feeling bad, run down with a headache. That evolved to where the patient has been laying around and not doing much of anything; taking it easy. Then, yesterday (15Sep2021) into today (16Sep2021), patient started feeling tension in the neck and the back as well as pressure in spine. This morning (16Sep2021) around 0200 the patient was up and felt like the spinal fluid pressure. Stated it was very uncomfortable. Feels like there was a weird, almost muscular pain or sensation; it felt inflamed, almost swollen.  The patient didn't want to move too much.  Stated it was very uncomfortable and alarming. The pain was not only in mid-upper back, it was up to the brain stem area and then "kinda goes to my scalp." The reporter described the feeling as the weirdest sensation, sometimes jolting. The reporter also described that when turning their head "it fires, feels like a nerve fire or spasm" and was very uncomfortable, making the patient not want to look up, down, or left or right. When the patient looked up it felt like they were straining; like their spine fluid was pressurized; like it was going to start shooting out. "My spinal fluid feels like its just been bursting out between my vertebrae. I am not felling well. It's just gonna kill me." The patient felt like they cannot swivel their head around; they had to look with their entire body. The patient reported having difficulty swallowing and increased pain with swallowing; it was getting increasingly painful and hard to swallow.  Also reported that first day, the right like muscle around the eye was like twitching a lot; it was kind of coming and going and the patient didn't know why the right eye is twitching it never does that. Denied any labs, testing, or treatments relevant to events and wanted to know if this was a common side effect noted and what to do regarding symptoms. The reporter initially stated they hadn't gone to the hospital yet (as of 16Sep2021); no doctors visit or emergency room visit was required. In response to being advised to contact nearest healthcare professional in case of any emergency, the reporter then stated "Hospital, Well, I guess that thing that Vaccine side effect put me in the hospital and I gonna be on bill that's like I can't afford that if I know it was this bad I would not have taken the vaccine. I really feel that I suffered some sort of injury, I don't know if this will last forever but I really feel really messed up like I am really frightened and I am kind of angry because of how, just in like I have never felt that like in my life".  The reporter felt like there was poison in their body, their body was also freaked out, they felt very like 'awkward,' excruciatingly painful to turn the head, look up and down, and that was very weird and the patient stated the "biofluid was getting a spine buzzing explode." The reporter also described intrusive pressure, "it felt like the brain stem ever since," it just started to really start getting hurt.  The outcome of the events were unknown.  Follow-up (21Sep2021): Follow-up attempts are completed. No further information is expected.