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.; 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.; her right arm still hurt; elbow hurt; This is a spontaneous report from a Contactable consumer or other non-health professional (patient). A 56-year-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Lot Number: EW0173, Batch no: Unknown) via unspecified route of administration administered in left arm on 14May2021 (at the age of 56-year-old) as dose 2, single for COVID-19 immunization. Medical history included accident in Mar2021. Accident was an impact injury to her left knee, joint injury, knee injury and she was hit in the wrong spot. The accident at work was prior to the vaccine. She was taking an anti-inflammatory and on crutches. Concomitant medications included celecoxib, metaxalone both were taken from 31Mar2021 to an unknown stop date for unspecified indication. Her knees were really hurting when she stopped taking, the metaxalone and she learned that this blocks pain and it is a muscle relaxer. No Family Medical History Relevant to AE. Historical vaccine included patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Formulation: Solution for injection, Lot Number: EW0162; Batch no: Unknown) via unspecified route of administration, administered in right arm on 23Apr2021 (at the age of 56-year-old), as dose 1, single for COVID-19 immunization and experienced with Right arm pain, Joint pain in that arm, her shoulder and elbow hurt, pain, Muscle itself is weak. Patient also received Flu shot in 2019 for H1N1 flu and other shot on unspecified date. 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. No other medications taken prior to vaccination within 4 weeks other than the first dose. Patient was calling about the Pfizer Covid19 vaccine. 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. On an unspecified date in 2021, after 2nd dose, Since the first dose she has had joint pain in that arm, her shoulder and elbow hurt, the muscle itself was weak and woke her up this morning. She got the second vaccine in her left arm since her right arm still hurt from the first vaccine. She was going back to work next week, and her right arm was really bothering her. She does not know what to do to make her arms feel better. Advised to consult with HCP. Asking if there was a protocol to follow. She does a lot of upper body stretches anyways when she works. Stated that 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 has put on 20 pounds in the last four months since she was on medication and was not able to walk. 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. She knows she can donate blood and will donate blood today. AE(s) did not require a visit to Emergency Room and Physician Office. She 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 a side effect. She has been doing physical therapy to get her leg working. She asked at physical therapy about her arm. 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. Relevant Tests was reported as none. Investigation Assessment was reported as No. The clinical outcome of the events was not recovered.    Description of Product Complaint: The right arm joint pain started in April after the initial arm pain was over and the joint pain never went away. The two medications she was taking at the same time of receiving the vaccine: Celecoxib dispensed in pharmacy vial (MFG: withheld) with Lot: 1011354, Expiration: May2022, NDC: it was really tiny, 50090-5178-1, Started on 31Mar2021. Metaxalone (MFG: withheld), Lot: 1055174, Expiration: Jun2022, NDC: 50090-3650-1, Started on 31Mar2021.