right knee pain; leg swelled up; I cant walk; arm pain / right leg pain; This is a spontaneous report from a contactable consumer or other non-healthcare professional. A 76-years-old female patient received bnt162b2 (BNT162B2, PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection), via an unspecified route of administration, administered in Arm Right on 18May2021 (Batch/Lot Number: EW0179) (at the age of 75-years-old) as DOSE 2, SINGLE for covid-19 immunization.  Medical history included arthritis (grandmother had a problem with her knee and leg, she had arthritis). Concomitant medications included hydrochlorothiazide, valsartan (VALSARTAN HYDROCHLOROTHIAZIDE AKRIKHIN) taken for hypertension ongoing from an unspecified start date (water pill for pressure, stated that she has been taking this medication over a year but that she sometimes does not take it. she read the warning labels off the bottle, that it may cause dizziness, to avoid prolonged use, and exposure to direct sunlight. When trying to read the dosage on the label, states that it is old. She has been taking it for about a year, give or take, but will have to talk to her daughter about it now that she has read those warnings on the bottle) and omega-3 fatty acids taken for an unspecified indication ongoing from an unspecified start date (did not take it every day). The patient previously received bnt162b2 (BNT162B2, PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection), via an unspecified route of administration, administered in Arm Right on 21Apr2021 (Batch/Lot Number: EN0169) for covid-19 immunization. The patient did not receive any other vaccine within 4 weeks prior to covid-19 vaccine. On an unspecified date in May2021, the patient experienced right knee pain, arm pain/right leg pain, leg swelled up and I cant walk. It was reported that after receiving the second dose, the Pfizer Covid-19 vaccine. She has been having problems with her leg and her knee. She though it was a Bakers cyst, but the doctor said they could not find anything. She spoke to other people who said they had similar problems. She usually goes to Good Samaritan (was unsure of correct spelling). She goes to him once a year for a heart check-up. She does not have a primary care physician. They were trying to get one for her because she does not have one at this present time. She has lifeline screening once a year to see if there is any problem. Her daughter also got the Pfizer, and she experienced the same pain that she had in the knee. She is much younger. A couple of neighbours had the same vaccine around her age. They also had it. A couple of people her daughters age had it. They told her to call. Also stated that she was a walker and has not been doing too much walking lately.  It was reported that arm pain first started with the arm, 3 or 4 days after the shot. That subsided and after that everything was ok. Then, she started to have pain in the leg and could not walk. It was about a week later. She rested and got off her feet. She started taking baths in Epson salts and was then able to get up and walk around. Another week after that, so 2 weeks after the vaccine, her leg swelled up and she put a bandage on it, that she had bought from the drugstore. Her leg swelled up. She looked at her foot and leg and went to Good Samaritan. She figured that it was a Bakers Cyst. She had that once about 10 years ago. When she went, they said that it was either a Bakers cyst or a blood clot. She knew it was not a blood clot because she just had her lifelong screening done. Then it went down. Now, a month later, everything seemed to be all right. But then her knee started to bother her a little bit. She usually washes the floor on her knees, but she could not get back up. Her knee started to bother her and swell. That went down, and she stayed off her feet and elevated her leg. Now it has been about a week later, and she has noticed that the pain is not like it was, but she is stiff underneath the knee. It was like, when you stretch out and it is stiff. She does not understand what that was. She cut an old pair of socks, cut the sock part off and put it over her knee and put on Bengay. It is still there, and it is annoying. That is the only way she can explain it. And it was sore when she touches it. If she put a heating pad on it, it seems to be ok. If she did not know better, she would think it was arthritis because it has to be warm; if it is cold, there is a problem. If it was compared to the other knee, that one is fine. But the right one tends to be hot. Clarified that the leg and knee she is referring to is the right leg and knee. The events resulted in Physician office visit because her leg swelled up and would not go down. She had one of those things you put on the leg if the knee hurts. She did not take it off for 2 days, and when she did take it off, her leg was swelled up. It was a concern because she can not walk like she should be and she have a lot of work to do and she had used everything and stated that I have put heat, if I put heating pads on it that will be that will help. But then that will go away for couple of days I would say for may be about three or four days may be and it comes back. She stated that she was not taking any medication for that and have not put bandage on it (I have put bandage on my knee but I am an older person). The clinical outcome of the events was unknown.  Follow-up attempts are completed. No further information is expected.