migraine; joints hurt so that I could walk barely; joints hurt so that I could walk barely; armpits hurt very badly; nausea; chills; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 63 year-old female patient (not pregnant) received bnt162b2 (BNT162B2), administered in arm right, administration date 12Oct2021 15:00 (Lot number: EW0169) at the age of 63 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "Neuropathies" (ongoing), notes: secondary to chemo 2006; "Raynaud's" (ongoing), notes: secondary to chemo 2006; "spinal stenosis" (ongoing); "arthritis" (unspecified if ongoing); "Migraine", start date: 1988 (ongoing), notes: since 1988- occasional; "pain issues" (unspecified if ongoing); "cholesterol" (unspecified if ongoing); "SI Joint" (unspecified if ongoing); "sleep" (unspecified if ongoing); "Periodic asthma" (unspecified if ongoing). Concomitant medication(s) included: FLUZONE QUADRIVALENT, administration date 07Oct2021; CYCLOBENZAPRINE taken for sacroiliac joint dysfunction (ongoing); HYDROCODONE taken for arthritis, stenosis, migraine (ongoing); MAGNESIUM OXIDE; TYLENOL taken for pain (ongoing); PRAVASTATIN taken for blood cholesterol abnormal (ongoing); ALPRAZOLAM taken for sleep disorder (ongoing). Past drug history included: Allergy: codein, reaction(s): "Allergy: Codein"; Allergy: demerol, reaction(s): "Allergy: demerol"; Allergy: ultram, reaction(s): "Allergy: ultram"; Allergy: ergotamine, reaction(s): "Allergy: ergotamine". Vaccination history included: Pfizer (Dose Number: 2, Batch/Lot No: ER8733, Location of injection: Arm Right, Vaccine Administration Time: 03:00 PM), administration date: 09Apr2021, when the patient was 63 years old, for COVID-19 Immunization; Pfizer (Dose Number: 1, Batch/Lot No: EN6207, Location of injection: Arm Right, Vaccine Administration Time: 03:00 PM), administration date: 19Mar2021, when the patient was 63 years old, for COVID-19 Immunization; Flu shot (Anatomical Site of injection: R. Arm), administration date: 07Oct2021, when the patient was 63 years old. The following information was reported: MIGRAINE (non-serious) with onset 12Oct2021 21:00, outcome "recovering", described as "migraine"; GAIT DISTURBANCE (non-serious), ARTHRALGIA (non-serious) all with onset 12Oct2021 21:00, outcome "recovering" and all described as "joints hurt so that I could walk barely"; LYMPH NODE PAIN (non-serious) with onset 12Oct2021 21:00, outcome "recovering", described as "armpits hurt very badly"; NAUSEA (non-serious) with onset 12Oct2021 21:00, outcome "recovering", described as "nausea"; CHILLS (non-serious) with onset 12Oct2021 21:00, outcome "recovering", described as "chills". Therapeutic measures were taken as a result of migraine, gait disturbance, arthralgia, lymph node pain, nausea, chills. Additional information: The Booster had much more severe side effects than the first two doses. My joints hurt so that I could walk barely and my armpits hurt very badly. I felt the same level of nausea, migraine, and chills. I'm glad I didn't know beforehand because I might have missed the booster. I understand these effects to be a strong immune response which is good news and I'm very grateful to Pfizer and (Privacy) for providing these vaccines. I won't tell anyone how awful I feel bec I would not deter anyone. At one point though the side effects were scary and I thought how awful for those suffering Covid in the hospitals and dying. I am tryi g to convince my son who is in a Frontline occup to get the booster. Still, I thought you should know the side effects were pretty rough. Still, I'm very grateful. Took hydrocodone though I had been greatly reduc. pain subsided after 2.5 days. Prior to the vaccination, the patient was not diagnosed with COVID-19. Since the vaccination, the patient had not been tested for COVID-19. Weakened immune system. Specific Relevant Test For Thromboembolic Events with Thrombocytopenia was unknown. Patient did not need emergency medical treatment due to the Booster. Children will be very wary if they have similar side effects. (Praying)  No follow-up attempts are possible. No further information is expected.