Her mother was having difficulty walking/ difficulty walking/ her mother is walking with a limp; "Moving pain" in her back, hip, leg, and knee/ pain is moving from her back, to her leg, to her  knee; "Moving pain" in her back, hip, leg, and knee/ pain is moving from her back, to her leg, to her  knee; Not feeling well; "Moving pain" in her back, hip, leg, and knee/ pain is moving from her back, to her leg, to her knee; "Moving pain" in her back, hip, leg, and knee/ pain is moving from her back, to her leg, to her knee; This is a spontaneous report from a contactable consumer. This consumer reported for a 82-year-old female patient (mother). A 82-year-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection Lot Number: EW0198) via intramuscularly in arm right on 22Jul2021 10:00 at the age of 82-years-old as dose 2, single for COVID-19 immunisation. Medical history included ongoing diabetic. Concomitant medications were not reported. Patient previously received includes bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection First dose of the COVID vaccine Lot Number: EW0196 Expiry date: Unknown Route, Anatomical Location: Right arm) on 01Jul2021 for COVID-19 immunisation and no reaction reported. Other Conditions diagnosed maybe 20 years ago. History of all previous immunization with the Pfizer vaccine considered as suspect (or patient age at first and subsequent immunizations if dates of birth or immunizations are not available). Additional Vaccines Administered on Same Date of the Pfizer Suspect, all vaccines administered on same date with the Pfizer vaccine considered as suspect was none. Prior Vaccinations (within 4 weeks) If applicable, any other vaccinations within four weeks prior to the first administration date of the suspect vaccine(s) was none. Adverse events following prior vaccinations was one, not relative to this. On 23Jul2021, the next day after vaccination her mother was having difficulty walking and moving pain in her back, hip, leg, and knee. And stated this was not normal for her mother and she was wondering if she needs to take her to an urgent care if this could be a serious side effect. Caller states her mother was walking with a limp and, in general, was not feeling well. She got the vaccine herself a while ago and did not feel like myself for a month after and asked if the way her mother was feeling could be related to the vaccine and if these are common side effects, specifically back pain and hip pain. if the side effect was normal or if she should take her to the emergency room. When probed for the outcome, the caller responds that the pain was moving from her back, to her side, knee. Adverse events did not require a visit to emergency room or physician office. She had been taking tylenol for the pain, but that is not helping that much. Her mother is walking with a horrible limp that she has not walked with before. The caller explains she knows that the shot is putting metal in her body, but ever since her mother got the second shot, she has had difficulty walking and the pain was moving from her back, to her leg, to her knee. It was informed to the caller that tiredness, weakness, joint pain, muscle pain, and feeling unwell are all commonly reported side effects of the Pfizer BioNTech Covid-19 Vaccine. These may not be all the possible side effects of the Pfizer-BioNTech COVID-19 Vaccine. Serious and unexpected side effects may occur. Vaccine was still being studied in clinical trials. COVID-19 vaccination will help protect you from getting COVID-19. You may have some side effects, which are normal signs that your body is building protection. These side effects may affect your ability to do daily activities, but they should go away in a few days. Some people have no side effects. Side effects that you may experience throughout the rest of your body (systemic side effects) including fever and chills were observed with the first 1 to 2 days after vaccination and resolved shortly thereafter. Side effects after your second shot may be more intense than the ones you experienced after your first shot. These side effects are normal signs that your body is building protection and should go away within a few days. These side effects usually start within a day or two of getting the vaccine. Side effects might affect your ability to do daily activities, but they should go away in a few days. Call the vaccination provider or your healthcare provider if you have any side effects that bother you or do not go away. Caller declines to include a healthcare professional for the report, stating they are just trying to figure out if this side effect is commonly reported. She knows it says muscle pain and joint pain, but that could mean a lot of different things. The clinical outcome of the events was not resolved.  No further details were provided or obtained as Tylenol is not a Pfizer product.