Baker's cyst in the right one; pain in right leg all the way down, started behind knee goes up to thigh and it goes down calf all the way to ankle and it's painful/whole right leg extremely sore/bloody painful; can't bend my knee it's so painful when I sit on my chair with the knee bent; can't bend my knee it's so painful when I sit on my chair with the knee bent; Could not walk/cannot walk; cried all day; Swelling and it's very painful; it's so painful when I sit on my chair with the knee bent; my pain is not going away; Swelling and it's very painful; it's so painful when I sit on my chair with the knee bent; my pain is not going away; This is a spontaneous report from a contactable consumer (patient) received from a Pfizer sponsored program. An 80 year-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Lot Number: ER8729, Expiration date: Jul2021), via an unspecified route of administration in arm left on 15Apr2021 (at the age of 80 years-old) as dose 2, single for COVID-19 immunization. The patient medical history was not reported. There were no concomitant medications. Historical vaccine included the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection), via an unspecified route of administration on an unspecified anatomical location on 17Mar2021 (Batch/Lot number unknown) (at an age of 80 years) as dose 1, single for covid-19 immunisation. The patient experienced baker's cyst in the right one, pain in right leg all the way down, started behind knee goes up to thigh and it goes down calf all the way to ankle and it's painful/whole right leg extremely sore/bloody painful, can't bend my knee it's so painful when i sit on my chair with the knee bent, could not walk/cannot walk, cried all day, swelling and it's very painful; it's so painful when i sit on my chair with the knee bent; my pain is not going away on 17Apr2021. The patient reported that she was completely fine before the second dose of Covid vaccine but about 2 days after she couldn't walk her whole right leg was extremely sore and when she went in, they have found a Baker's cyst and there's swelling and it's very painful and she cannot walk and she said she was fine before the vaccine. Now before she got the vaccine, she was fine, she could walk the length of mile and back. She could walk to the golf course; she could walk all over the town. Since, she got the second vaccine shot couple days after she got the second shot. she had a pain in her right leg all the way down to, well started behind her knee and it goes up to her thigh and it goes down her calf all the way to her ankle and it's so painful. She can't walk. She cannot walk and she went to pain doctor, and she sent her to get a test to make sure she didn't have a blood clot. No, she didn't have a blood clot. She said it came back showing Baker's Cyst. Now, she had no baker's cyst before she got the vaccine. She could all over town and she really have to walk because she doesn't drive so she used to walk all over and all of a sudden, she was housebound. She can't walk and she can't bend her knee it's so painful when she sits on her chair with the knee bent. The only time she gets relief was if she has her leg stretched out in front of her on a recliner. She was on Ibuprofen and all kinds of pain medication and ointment for her leg pain ointment. She was so sorry, so damn sorry that she ever got that vaccine. She was so sorry, and we know the funny part it was she took a lift ride to the doctor's office the other day and she was chatting with the left driver also women and she said she had gotten your vaccine both shots and she said, after the second shot she was kind of sick couple days. She had been taking time off her work and she said she also had a slight pain in her leg (Further clarification unknown). But her pain went and her (reporters) pain is not going away. She was hoping maybe we can suggest some kind of something she could take for her pain. Honestly, she was in such pain yesterday she could have cried all day. She was in such pain. She doesn't have any medication. She was not on any medication. She hasn't had anything wrong with her. 15Apr was the second one. She should've just went with the first one, and not bothered with that second one, but she has heard so many people saying they haven't had much reaction after the second one, so she thought it was the safest vaccine, she doesn't know, sure didn't get safe with her. The consumer mentioned she has nothing and she doesn't take any medications at all. She was very healthy; in fact she hasn't even got a primary physician because she was so healthy down here since she came to place. She has been here for 5 years and she hasn't had a doctor. So that's how healthy she was. She had an ultrasound to see if she had a blood clot that's when she went to the pain doctor, she just went back to her on Monday actually of this week to find out the results of the test and she did some X-rays of her knees she did both knees at the left one as comparison to the right one and nothing except the Baker's cyst in the right one. She was taking Ibuprofen, she was taking arthritic Tylenol and She has got pain, pain gel that she rub on her leg and still in the morning when she gets up after sleeping in bed all night she can walk to the kitchen to get her breakfast but after that throughout the day she got severe pain. If she tries to walk even in her little townhouse here and if she ever tries to walk to the mailbox or garbage, Oh god! She has to stop about 6 times each way to go to the mailbox to rest her leg. It was so bloody painful. Event She cannot walk resulted in physician visit. On an unknown date, the patient underwent lab tests and procedures which included Ultrasound: Unknown Result and X-ray of knees: Unknown Result. The outcome of all the events were unknown.  No follow-up attempts are needed. No further information is expected.