Cervical vertebra #8 through Lumbar vertebra #5 is very, very painful; in excruciating pain; muscle tenderness; muscle tightness; pain feels like someone kicked her in her kidneys; pain feels like it's punching her lungs; pain is a 10 plus in both flanks; back pain; This is a spontaneous report from a contactable consumer (patient). A 59-year-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE), dose 2 via an unspecified route of administration, administered in arm right on 20Apr2021 08:26 (Lot Number: ER8732) as single dose for COVID-19 immunisation. Medical history included ongoing asthma, ongoing hypertension, ongoing mitral valve prolapse, ongoing Tarlov cysts and ongoing mobility issues and problems standing and sitting. The patient had a neurological condition caused Tarlov Cysts. These cysts populated right outside of the dorsal root nerve system. In her, it's cervical vertebra #5 all the way down her spine bilaterally. In May2018, she had a surgical procedure, not an aspiration, for 8 of the nerves in her sacrum. She has had complications ever since. Cervical vertebra #7 and #8 have been giving her the most problems.  Concomitant medications included ongoing oxycodone hydrochloride, oxycodone terephthalate, paracetamol (PERCOCET) 10mg every 4 hours taken for pain, and her doctor recently changed it; ketorolac tromethamine (TORADOL) injection and something for acid reflux but she did not think that's relevant. The patient previously received the first dose of bnt162b2 (lot number: EN6208) in arm right on 16Mar2021 9:48AM for COVID-19 immunisation at the age of 59-year-old and she had no problems just soreness in her arm. There were no Prior Vaccinations within 4 weeks. She had her second Covid 19 vaccine yesterday morning, 20Apr2021. Cervical vertebra #8 through Lumbar vertebra #5 was very, very painful from 20Apr2021. She didn't know or hasn't heard if the Covid 19 vaccine is associated with her back pain. This pain that she's having now didn't feel like the pain she had related to her Tarlov cysts.  Before the Covid 19 vaccine she had no problems until late last night (20Apr2021) and early this morning (21Apr2021). She was in excruciating pain. She reported it's complicated for her to make that mind adjustment. She texted her cousin this morning at 6:30AM (21Apr2021) because she had to let her cousin know what was going on. If her cousin texts and she doesn't respond, her cousin will do a welfare check. She doesn't want a welfare check so she told her cousin to just let her sleep, let her see how she feels when she's up again. She reported sometimes when the Tarlov cysts were bothering her she could lay on her back and it would soothe her pain. This time that was not working. She reported she had her vertebra and her discs and then her outer muscular system to the flank, that is where it was painful. She didn't know if this is normal. She was hearing normal side effects like tiredness and fatigue, she was not having those because she was not normal. She was 1 in 2 billion with her Tarlov cysts. She has complications with her Tarlov cysts. She has mobility issues and problems standing and sitting. She has Tarlov cysts from Cervical vertebra #5 bilaterally down. She had multiple cysts. She didn't know if the Covid 19 vaccine was aggravating her back. She reported she has 2 nervous systems, her parasympathetic and her sympathetic nervous system. She reported this is in her parasympathetic nervous system. She reported sensory, if she touches something hot, she knew it was hot. She reported this is so important. She had muscle tenderness and muscle tightness from 20Apr2021and that's it. She knew what she was taking about because she was using medical terminology. The pain felt like someone kicked her in her kidneys. The kidneys, where the waist is on her back to the top of her sacral area and up the spine to where her first rib is and go outward, that's where her pain was, from thoracic vertebra 12 to lumbar 5.  The only different thing she's done was get the Covid 19 vaccine. She was trying to triage herself. She didn't know what else to do. The Percocet was not even fixing it. She wanted to make sure the Covid 19 vaccine wasn't exacerbating her disease. She thought that's what's happening. She was in a lot of pain. Her pain was the same before and after when she took the Percocet. Normally the Percocet calmed her down to where she's functional and the Percocet was not. Percocet was 10-325mg, oxycodone and acetaminophen. Take one 4 times daily as needed for pain. The Percocet was a pharmacy bottle. In order for her to have a quality of life she also took Ketorolac or Toradol. She hadn't taken that today (21Apr2021). She picked her prescriptions up at the same time she received her Covid 19 vaccine.  She can lay on the ground on her back sometimes and her pain will be alleviated. Now laying on her back exacerbates her pain. She didn't know if it's muscular. If she was diagnosing herself, she would say it's not muscular. She knew enough about Tarlov cysts that she knew how to rule it out. She reported her felt feels like it's punching her lungs.  She reported it's so hard to explain. She's trying to separate the pain she has from her Tarlov cysts from what she's experiencing now. She reported her pain was a 10 plus in both flanks. She stated people will call flanks "the sides". The only reason she knows it's a flank is because she had learn anatomy real quick with her Tarlov cysts. On the date of her first Covid 19 vaccine she had a steroid injection and a Toradol injection. With her second Covid 19 vaccine she had a Toradol injection. The pharmacist told her there would be no conflict in receiving the Covid 19 vaccine. she has to suffer through it until her pain subsides. It feels like it's kicking the heck out of her back. When she lays supine she can alleviate some of the pain associated with the Tarlov cysts but that's not working.  She can't stand or lay supine, all of that is out the window. Meaning it's not working. This pain has to be the Covid 19 vaccine. She's in a lot of pain and she didn't need the vaccine to exacerbate her pain. There were no vaccines administered on same date with the Pfizer vaccine considered as suspect. The adverse events did not require a visit to Emergency Room or Physician Office. The outcome of events was not recovered.  No follow-up attempts are needed. No further information is expected.