both of my feet turned bright red; veins on my feet going up the front of my legs started protruding; My feet were extremely painful; Booster; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 58 year-old female patient (not pregnant) received bnt162b2 (BNT162B2), administered in arm left, administration date 22Oct2021 (Lot number: FF8841) at the age of 58 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "Rheumatoid Arthritis" (unspecified if ongoing); "Hashimotos" (unspecified if ongoing); "Hypothyroid" (unspecified if ongoing), notes: Hypothyroid. Concomitant medication(s) included: FLU VACCINE VII taken for immunisation, administration date 21Oct2021; TIROSINT taken for thyroid disorder; EST [ESTRADIOL BENZOATE]. Past drug history included: Prednisone, reaction(s): "Known allergies: Prednisone". Vaccination history included: Bnt162b2 (Dose Number: 1, Batch/Lot No: EL9261, Location of injection: Arm Left), administration date: 12Feb2021, when the patient was 57 years old, for Covid-19 immunization, reaction(s): "I have autoimmune disorders - RA and Hashimotos", "Having swelling in my hands and feet", "Having swelling in my hands and feet"; Bnt162b2 (Dose Number: 2, Batch/Lot No: EN6203, Location of injection: Arm Left), administration date: 04Mar2021, when the patient was 57 years old, for Covid-19 immunization, reaction(s): "I have autoimmune disorders - RA and Hashimotos", "Having swelling in my hands and feet", "Having swelling in my hands and feet". The following information was reported: IMMUNISATION (non-serious) with onset 22Oct2021, outcome "unknown", described as "Booster"; ERYTHEMA (non-serious) with onset 23Oct2021 16:00, outcome "recovered with sequelae", described as "both of my feet turned bright red"; VEIN DISORDER (non-serious) with onset 23Oct2021 16:00, outcome "recovered with sequelae", described as "veins on my feet going up the front of my legs started protruding"; PAIN IN EXTREMITY (non-serious) with onset 23Oct2021 16:00, outcome "recovered with sequelae", described as "My feet were extremely painful". The events "both of my feet turned bright red", "veins on my feet going up the front of my legs started protruding" and "my feet were extremely painful" were evaluated at the physician office visit. Therapeutic measures were not taken as a result of erythema, vein disorder. Therapeutic measures were taken as a result of pain in extremity. The patient stated that, she had autoimmune disorders - RA and Hashimoto's. she started having swelling in her hands and feet after the first 2 covid vaccinations. The day after the booster both of the feet turned bright red and the veins on her feet going up the front of my legs started protruding. Her feet was extremely painful and ibuprofen and alieve did not help. They were no longer as painful or red but still hurt. She also filed the adverse event report after the first two vaccinations but did not hear anything back. She went ahead with the booster due to my autoimmune issues. Prior to vaccination, patient was not diagnosed with COVID-19. Since the vaccination, the patient was not tested for COVID-19.    Follow-up attempts are completed. No further information is expected.