Ran a little fever; The patient's joint pain has come back again 3 other times; Every 3-4 days after that shot, the patient's knee is all swollen and everything/joints were swollen; that the patient is still limping but he had her on crutches.; Second dose of Covid-19 vaccine received less than 21 days after first dose; joints were inflamed; Other leg is all messed up in the same area in the joints; This is a spontaneous report from a contactable consumer (reporter's wife). A 56-year-old female patient received second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection), via unspecified route of administration on an unspecified date in Jun2021 (Lot number and expiration date was not reported) as single dose for COVID-19 immunization. The patient had not received any other vaccines within 4 weeks prior to the COVID vaccine. The patient's medical history was not reported. Family history included patient's mother suffers from diabetes and high blood pressure and starting to get dementia and is getting to the stage where she is aggressive and lies all the time. The patient's concomitant medication was not reported. Patient previously took BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE) on 28May2021 for COVID-19 Immunization and it was reported as 3-4 days after the first dose the wife's joints were swollen and inflamed then after 3-4 days the left knee also became swollen and inflamed. These were also experienced on the second dose. He is calling to know if these have been reported before. On an unspecified date in Jun2021 patient had both doses of the Pfizer-BioNTech COVID-19 Vaccine. 3-4 days after the first dose the wife's joints were swollen and inflamed then after 3-4 days the left knee also became swollen and inflamed. These were also experienced on the second dose. It was reported as patient was treated the swollen and inflamed joints for the patient with ibuprofen, Tylenol, ice, and also wrapped it and the swelling and inflammation went away within 3-4 days. Patient's left knee then started to get swollen and the inflammation and swelling is all related to joints and mobility. She was reported that it was the same as the wrist, the patient's left knee was starting to get swollen and she took care of the patient on that one the same way, with Tylenol, ibuprofen, ice, and wrapped it. The patient got a second shot of the Covid-19 vaccine and now her other leg is all messed up in the same area in the joints. It was reported as patient got the second shot of the Covid-19 vaccine probably about a week ago, and within maybe 4 days her other knee is now swollen. The patient went to the clinic after her joint issues and the clinic staff gave the patient a cortisone shot and its relieved the pain and everything for a little bit. Patient's joint pain has come back again 3 other times. Other leg is all messed up in the same area in the joints and the patient got the second Covid-19 shot and she's wounded again with the other knee and inflammation and swelling in the patient's knee came back. Second dose of Covid-19 vaccine received less than 21 days after first dose. Patient is still limping but he had her on crutches. Patient was visited to physician office. It was reported as after receiving second dose patient's temperature was 100.4 on 17Jun2021 and the patient was treated with Tylenol to reduce the fever. She hasn't had a fever since. The outcome of event (fever) was recovered on 17Jun2021 and (limb discomfort, Joint pain and Limping) was not recovered and unknown for other events.  Information on lot number/ batch number has been requested.