left kidney was hurting her; she woke up sweating; intermittent back and forth throbbing discomfort from her kidneys; Pfizer booster shot; discomforting; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A female patient received bnt162b2 (BNT162B2), administration date 20Nov2021 12:30 (Batch/Lot number: unknown) as dose number unknown (booster), single for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. Vaccination history included: Johnson and johnson vaccine, administration date: 02Apr2021, for COVID-19 immunization, reaction(s): "fatigued", "had a sore arm for a day or two". The following information was reported: IMMUNISATION (non-serious) with onset 20Nov2021, outcome "unknown", described as "Pfizer booster shot"; RENAL DISORDER (non-serious) with onset 21Nov2021, outcome "unknown", described as "intermittent back and forth throbbing discomfort from her kidneys"; HYPERHIDROSIS (non-serious) with onset 21Nov2021 01:00, outcome "unknown", described as "she woke up sweating"; DISCOMFORT (non-serious) with onset 2021, outcome "not recovered", described as "discomforting"; RENAL PAIN (non-serious) with onset 22Nov2021, outcome "not recovered", described as "left kidney was hurting her". Relevant laboratory tests and procedures are available in the appropriate section.  Additional information: The caller stated that she got the Pfizer booster shot on Saturday morning. The caller received her Johnson and Johnson vaccine on 02Apr2021. She had no problems besides that it laid her up for the day. She was fatigued and had a sore arm for a day or two. The caller really truly thought the booster dose would have the same effects. The caller explained that she did her research and she chose the Pfizer shot over the Moderna because with the Pfizer shot, she didn't see any adverse reactions other than chills, fever. She got the booster right around 12:30 in the afternoon on Saturday. On 1:00 am Sunday, she woke up sweating and experiencing all the things you could imagine. She took her temperature and oddly enough, she had no temperature. She thought okay, this was a side effect, this was to be expected and not a concern. She became concerned when she woke up the next morning and her left kidney was hurting her and it's still hurting her. She didn't even know that was her kidney, but her sister was a nurse, and told her that was her kidney. The pain the caller was talking about was very unique. It felt like somebody was squeezing the inside and then releases it, which stops the pain for a second, and then it did it again. The caller clarified it's like a throbbing pain that started with the left kidney and shifted over to the right kidney yesterday which kind of limited the pain to her left kidney. It's either that, or the pain in the right kidney superseded the pain in her left kidney. Today, the pain in her right kidney subsided and she was having pain in her left kidney again. It's intermittent, back and forth, throbbing discomfort from her kidneys. It felt like a back injury but its not. The caller mentioned that she was retired private investigator and she sold her firm and moved back to the area. Her health insurance did not kick in until next month and she was concerned about what's going on with her health and she wanted to know if Pfizer would allow her to seek a medical professional. The caller didn't know someone from CDC contacts them but she had someone from the CDC contact her. There also was a blog she jumped on yesterday and reported what she experienced to see if anyone else experienced the same thing and a journalist from privacy contacted her. She was very pro-vaccination obviously and wanted to do the right thing, so she wanted to know if Pfizer would tell what was going on before she got in contact with the journalist. The caller asked the call handler, as a nurse, should she be concerned about that. It's definitely discomforting and not going away. The caller asked the call handler if she could be a liaison to convey that she wanted Pfizer to make an arrangement with a healthcare professional from Pfizer that she could go see. The caller asks if she talked to somebody in Medical Information, would they be assisting scheduling an appointment. She did not want to complete a report. She did not want to talk about product safety. She wanted to know if she did take the time out of work to talk to someone, would it be a beneficial conversation or would they talk about side effects like fatigue, which she already knows all of that. She wanted to know if anything had happened to the kidney after receiving the Pfizer vaccine. The caller stated that she did not have any health insurance and she would assume since it's Pfizer's vaccine and a presumed side effect from the vaccine, Pfizer could have a medical professional look at her and assess her to test her kidneys. She stated that if Pfizer did not want to do that which it seemed that was the case, there were other routes she could take. She would think Pfizer would want to figure out side effects for women in their 50's. The caller requested to a follow-up call. She declined to transfer from Medical Information, she did not want an explanation of side effects like fatigue or fever. It did not seem medical information could answer questions related to kidneys that benefits her. She declined to complete a report stating she did not appreciate Pfizer and it seems Pfizer did not care at all. She might reach back out to the journalist who contacted her because she felt this was not going anywhere and might be this needed to be brought to light in the public. She stated that its unfortunate. She was a very big proponent of vaccinations and she wanted to work with Pfizer but all Pfizer wanted was to take her information for statistical purposes, which she understood. She used to work for the privacy, but she would feel since it is Pfizer's vaccine they would provide a medical provider. She did not have health insurance and was very upset. She hoped that her information was clearly conveyed and someone could call her back in a higher position.   The lot number for bnt162b2 was not provided and will be requested during follow up.