booster dose; muscle weakness to the point she needs to use a cane to ambulate and her knees throb at night while in bed.; her knees were throbbing which has never happened before/She ached all over; she felt dizzy/ she felt lightheaded like she felt like if she turned her head too fast; arm is still itchy and tender; she felt like they were bruised on the bottom; Every bone, muscle and joint in her body was aching; hard to stand on her feet; chronic hip and back pain has tripled; leg weakness; She was extremely lethargic; Chills; Her feet in particular, she felt like they were bruised on the bottom/heel pain; Every bone, muscle and joint in her body was aching; Every bone, muscle and joint in her body was aching; giant knot up under the injection site; It also itched like she had a thousand mosquito bites, her whole arm itched / her arm is still itchy; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 67 year-old female patient received bnt162b2 (COMIRNATY), administered in arm left, administration date 05Dec2021 (Lot number: FH8030) at the age of 67 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "Hypothyroidism" (ongoing); "Blood pressure high" (ongoing); "Osteoarthritis" (unspecified if ongoing). Concomitant medication(s) included: TELMISARTAN taken for hypertension; LEVOTHYROXINE taken for thyroid disorder. Vaccination history included: Bnt162b2 (1st dose, Route, Anatomical Location:  Upper Left arm), administration date: 16Feb2021, when the patient was 66 years old, for COVID-19 immunization, reaction(s): "she had minor side effects with the primary series of the Pfizer Covid Vaccine"; Bnt162b2 (2nd dose, Lot number: ENG198 or EN6198. , Route, Anatomical Location:  Upper Left arm), administration date: 09Mar2021, when the patient was 66 years old, for COVID-19 immunization, reaction(s): "she had minor side effects with the primary series of the Pfizer Covid Vaccine". The following information was reported: IMMUNISATION (non-serious) with onset 05Dec2021, outcome "unknown", described as "booster dose"; MUSCULAR WEAKNESS (non-serious) with onset Dec2021, outcome "unknown", described as "muscle weakness to the point she needs to use a cane to ambulate and her knees throb at night while in bed."; PAIN (non-serious) with onset Dec2021, outcome "unknown", described as "her knees were throbbing which has never happened before/She ached all over"; DIZZINESS (non-serious) with onset Dec2021, outcome "unknown", described as "she felt dizzy/ she felt lightheaded like she felt like if she turned her head too fast"; TENDERNESS (non-serious) with onset Dec2021, outcome "not recovered", described as "arm is still itchy and tender"; CONTUSION (non-serious) with onset Dec2021, outcome "unknown", described as "she felt like they were bruised on the bottom"; BONE PAIN (non-serious), ARTHRALGIA (non-serious), MYALGIA (non-serious) all with onset Dec2021, outcome "unknown" and all described as "Every bone, muscle and joint in her body was aching"; DYSSTASIA (non-serious) with onset Dec2021, outcome "unknown", described as "hard to stand on her feet"; OSTEOARTHRITIS (non-serious) with onset Dec2021, outcome "unknown", described as "chronic hip and back pain has tripled"; ASTHENIA (non-serious) with onset Dec2021, outcome "not recovered", described as "leg weakness"; LETHARGY (non-serious) with onset Dec2021, outcome "unknown", described as "She was extremely lethargic"; CHILLS (non-serious) with onset Dec2021, outcome "unknown", described as "Chills"; PAIN IN EXTREMITY (non-serious) with onset Dec2021, outcome "unknown", described as "Her feet in particular, she felt like they were bruised on the bottom/heel pain"; VACCINATION SITE NODULE (non-serious) with onset Dec2021, outcome "recovering", described as "giant knot up under the injection site"; VACCINATION SITE PRURITUS (non-serious) with onset Dec2021, outcome "not recovered", described as "It also itched like she had a thousand mosquito bites, her whole arm itched / her arm is still itchy". Relevant laboratory tests and procedures are available in the appropriate section.  Additional information: The caller mentions she had a very mild reaction with the first shot and then it was a little more stringent on the second shot and lasted a few more days. Her feet in particular, she felt like they were bruised on the bottom. It was hard to stand up on her feet, especially on her left heel. She had severe heel pain, it felt like someone hit her with a hammer just on her heel. All of her joints in her feet ached all over. She has not had knee pain before. However, when she laid down at night, her knees were throbbing which has never happened before. She also had the chills. She had no fever, but just chills off and on for the first few days. She is still experiencing leg weakness. It's like the muscle in her legs are still weak, it is hard for her to stand up. She has to really be careful or she will fall backwards, it's like her legs don't want to lift her. She has always had chronic hip and back pain but it  feels like the pain has tripled and it hasn't gone away. If she would go back to the normal former pain level she had, that would be a relief. Prior Vaccinations (within 4 weeks) was none. She does get blood work done every 3 months for her regular doctor though.  No follow-up attempts are possible. No further information is expected.