really bad flare up of rheumatoid arthritis; she had a fever of 101.5 degrees Fahrenheit; she had chills; After her second COVID-19 Vaccine, she had a headache; After her second COVID-19 Vaccine, she was tired; her hands and feet  got real swollen; She said she hadn't felt right; hadn't felt right; This is a spontaneous report from a contactable consumer (patient) via Pfizer sponsored program. A  60-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 left arm on 23Mar2021 between 17:20-17:30 as 1st dose, single dose for COVID-19 immunization. Medical history included ongoing rheumatoid arthritis (from 2003), she has had rheumatoid arthritis for almost 20 years. Concomitant medication included Xeljanz XR 11mg. On 24Mar2021, patient had fever of 101.5 degrees Fahrenheit, chills, headache, she was tired. On an unspecified date in Mar2021, her hands and feet got real swollen, she had not felt right since she had COVID-19 Vaccine. It was reported that patient received her second shot of Pfizer (COVID-19) Vaccine on 13Apr2021 and experienced really bad flare up of rheumatoid arthritis in Apr2021. The patient stated she got both doses of the Pfizer (COVID-19) Vaccine, and after her second (COVID-19) Vaccine, she had a really bad flare up of rheumatoid arthritis. The patient stated her doctor put her on Prednisone for 2 weeks. Reported she had received her second COVID-19 Vaccine dose right before her 61st birthday. She said she went to her rheumatologist, and her rheumatologist told her she should report her side effects to Pfizer. She said she already reported her COVID-19 Vaccine side effects on V-Safe. Patient took 1 Tylenol (8HR Arthritis Pain Extended Release 650mg, Lot Number: LPA095, Expiration Date: Aug2020) for a fever of 101.5 degrees Fahrenheit. She said the Tylenol helped her fever, providing. Reported the Tylenol 8HR Arthritis Pain Extended Release 650mg was expired, but the product still worked. Patient stated for Rheumatoid Arthritis Flare Up,  her rheumatologist prescribed 1 Prednisone 5mg tablet, once a day, for 2 weeks. She said she saw her rheumatologist on 17May2021. She said she completed her Prednisone 5mg prescription, and the Prednisone 5mg tablets were dispensed in a pharmacy bottle, and she didn't have the Prednisone 5mg NDC, Lot, and Expiration Date. Reported she was feeling better now, but wanted to report her Pfizer BioNTech COVID-19 Vaccine side effects to Pfizer, so she could help other people with rheumatoid arthritis. Reported she continued to take her Xeljanz XR 11mg while she took the Prednisone 5mg tablets, providing the Xeljanz XR 11mg (NDC Number: 0069-0501-30, LOT Number: DJ2906, Expiration Date: 31May2022). Reported she was feeling better now, but she was not 100%. She said she could actually walk now. She said she still had swelling in her hands and feet. She said the swelling had improved in her hands, saying she could make a fist now, but she couldn't wear her wedding ring. She her sandals still felt tight on her feet. Reported she was very reluctant to get a COVID-19 Vaccine booster shot in 12 months with her auto immune disease. She said she was not going to get the COVID-19 Vaccine booster, if she was going to have the same reaction she had after her second COVID-19 Vaccine dose. Patient asked if Pfizer had done any studies with people who had rheumatoid arthritis and the COVID-19 Vaccine. The outcome of the event fever, chills, headache was recovered on 25Mar2021 and outcome of the other events was recovering.  Follow up attempts are needed. Further information has been requested.