muscle itself is weak; She weighs 20 pounds more than when she got the vaccine.; was not able to walk.; had pain in her right arm; right arm joint pain/joint pain in that arm, her shoulder and elbow; This is a spontaneous report from a contactable consumer (Patient) via medical information team.  A 56-year-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; solution for injection, Lot Number: EW0162), via an unspecified route of administration, in right arm on 23Apr2021 (at the age of 56-year-old) on right arm as a dose 1, single for COVID-19 immunization. Patient had medical history of accident on unspecified date in Mar2021 (At that time, time and this summer she has been out of work since she had an accident in March. Clarified that the accident was an impact injury to her left knee at work, a box hit her hard as if she was hit by a car, she was hit in the wrong spot. The accident at work was prior to the vaccine), patient previously received past drugs of Celecoxib, Metaxalone and flu vaccine. patient concomitant medication was not reported. Patient received her first dose of the Pfizer Covid-19 vaccine in her right arm on 23Apr2021 and the second dose in her left arm in 14Mar2021. Patient stated that she has had pain in her right arm since the first dose of the Pfizer Covid-19 vaccine. patient reported that she still has this pain today and describes it as "you exercised it too much and it's sore". Patient stated that she has been taking an anti-inflammatory (Celecoxib) and a muscle relaxer (Metaxolone) as well as participating in PT since March 2021 due to a left knee injury. Patient queried for if there are any medications or any exercises recommended for her complaint of pain in her right arm. In response to query it was provided with information like Pfizer does not provide any recommendations regarding the management or treatment of potential adverse events/reactions/symptoms that a patient /consumer may experience. patient doctor/healthcare provider was in the best position to advise you about the appropriate action to take as your doctor/healthcare provider was most familiar with your medical condition, clinical history, how your treatment has been conducted and any relevant information to your specific case. Patient reported that about the Pfizer Covid19 vaccine. She had the lot number of vaccine that she received. Her first vaccine was back on 23Apr2021. She had a reaction and was in pain within 6 hours, the right arm pain lasted for three days, it got better after 24 hours slowly. Since the first dose she has had joint pain in that arm, her shoulder and elbow hurt, the muscle itself is weak and woke her up this morning. She was taking an anti inflammatory and on crutches. The day she got the vaccine she was pushed in the wheelchair and by then end of that day she got the vaccine, she could not use her crutches. She got the second vaccine in her left arm since her right arm still hurt from the first vaccine. She is going back to work next week and her right arm was really bothering her. She suffered from a knee injury from the work accident. She does not know what to do to make her arms feel better. Advised to consult with health care professional. Asking if there was a protocol to follow. She does a lot of upper body stretches anyways when she works. She weighs 20 pounds more than when she got the vaccine. She has put on 20 pounds in the last four months since she was on medication and was not able to walk. She has not been to the VA this year. States the arm pain she felt in her right arm was not the same as the joint pain she still has in her right arm. The right arm pain was a 10 on the pain scale that started the same day of the first dose and by 26Apr2021 she felt like she was back to normal and could use her crutches again. The right arm joint pain started in April after the initial arm pain was over and the joint pain never went away. She could give the names of muscle relaxer and anti-inflammatory that she was taking at the time, she started taking them prior to receiving the covid vaccine. The two medications she was taking at the same time of receiving the vaccine: Celecoxib dispensed in pharmacy vial MFG: AS Medical Solutions LLC Lot: 1011354 Expiration: May2022 NDC: it is really tiny, 50090-5178-1 Started on31Mar 2021 Metaxalone MFG: AS Medical Solution LLC Lot: 1055174 Expiration: JUN 2022 NDC: 50090-3650-1 Started on 31 Mar 2021 Her knees were really hurting when she stopped taking, the metaxalone and she learned that this blocks pain and it was a muscle relaxer. She knows she can donate blood and will donate blood today. Patient had not attended any emergency Room or physician Office as cannot afford to go, she iced it and hung tight. She does not think that there was anything they can do for it. She knows it was aside effect Prior to vaccination 4 weeks patient had not received any vaccines. aside from the first dose AE(s) following prior vaccinations: A long time ago she used to get flu shots till the reaction was too bad and she has not taken the flu shot in decades. The flu shot was completely different ingredients than the covid vaccine since she looked up the ingredients. She had a flu vaccine two years ago in 2019 in the beginning of the year, for H1N1 flu. She is the person the gets the flu after the flu shot. She does not have name, lot, ndc, or expiration date of the flu shots she was referring to. She has been doing physical therapy to get her leg working. She was in excellent health for a woman her age and will continue to work. She asked at physical therapy about her arm. All the elderly people she took to get the covid vaccine, nobody had a problem. The vaccine itself did not hurt, but 6 hours later, wow what a punch. She is very physical with her work. She will be moving her arm a lot when she goes back to work. She does not know if there was something she can do to make it easier since she still feels it in her arm and she finds this bizarre. Outcome events had pain in her right arm was recovered 26Apr2021, right arm joint pain/joint pain in that arm, her shoulder and elbow was not recovered, muscle itself is weak, She weighs 20 pounds more than when she got the vaccine, was not able to walk was unknown.   Follow-up attempts are completed. No further information is expected.