cannot walk; pain/no change in the patients foot; he got the booster; triple fracture in his left heel; weakness; was 286lb back then/lost 70lb; Plantar fasciitis tightness up the tendon and muscle; Plantar fasciitis tightness up the tendon and muscle; Plantar fasciitis tightness up the tendon and muscle; he lost his appetite; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP).  A 84 year-old male patient received bnt162b2 (BNT162B2), administered in arm left, administration date 18Oct2021 10:18 (Lot number: 3015BA) at the age of 84 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "triple fractures" (unspecified if ongoing), notes: he was diagnosed 3 months ago with the triple fractures; "plantar fasciitis" (unspecified if ongoing). Family history included: "Dementia" (unspecified if ongoing), notes: The dementia was diagnosed 01Nov2021 but she knew he had it because she lived with him everyday. The patient's concomitant medications were not reported. Vaccination history included: Bnt162b2 (First dose: Lot: EK9231), administration date: 25Jan2021, when the patient was 84 years old, for COVID-19 Immunization; Bnt162b2 (Second dose:  Lot: EN6198, left arm), administration date: 18Feb2021, when the patient was 84 years old, for COVID-19 Immunization, reaction(s): "could not walk on his left foot."; Flu (He has since had his flu and pneumonia shots but there has been no change in the patients foot.), for Immunization; Pneumonia shot (He has since had his flu and pneumonia shots but there has been no change in the patients foot.). The following information was reported: IMMUNISATION (medically significant) with onset 18Oct2021, outcome "unknown", described as "he got the booster"; GAIT INABILITY (hospitalization) with onset Oct2021, outcome "unknown", described as "cannot walk"; PAIN IN EXTREMITY (hospitalization) with onset Oct2021, outcome "unknown", described as "pain/no change in the patients foot"; FOOT FRACTURE (non-serious) with onset Oct2021, outcome "unknown", described as "triple fracture in his left heel"; ASTHENIA (non-serious) with onset Oct2021, outcome "unknown", described as "weakness"; WEIGHT DECREASED (non-serious) with onset Oct2021, outcome "unknown", described as "was 286lb back then/lost 70lb"; PLANTAR FASCIITIS (non-serious), MUSCLE TIGHTNESS (non-serious), TENDON DISORDER (non-serious) all with onset Oct2021, outcome "unknown" and all described as "Plantar fasciitis tightness up the tendon and muscle"; DECREASED APPETITE (non-serious) with onset Oct2021, outcome "unknown", described as "he lost his appetite". The patient was hospitalized for gait inability, pain in extremity (hospitalization duration: 8 day(s)). The events "cannot walk", "pain/no change in the patients foot", "triple fracture in his left heel", "weakness", "was 286lb back then/lost 70lb", "plantar fasciitis tightness up the tendon and muscle", "plantar fasciitis tightness up the tendon and muscle", "plantar fasciitis tightness up the tendon and muscle" and "he lost his appetite" were evaluated at the emergency room visit. The patient underwent the following laboratory tests and procedures: x-ray: (2021) fracture, notes: showed a triple fracture in his left heel. Therapeutic measures were taken as a result of foot fracture.; Clinical course: The patient did not receive prior vaccine within 4 weeks. He doesn't take medication, only vitamins. He had second dose on 18Feb2021 in the left arm. After that, 4 days later he could not walk on his left foot. He didn't go to a podiatrist right away because they thought it would go away. It didn't and so he went to the doctor, and he was given a short boot. Two and half months ago he went back to the podiatrist because the problem was continuing. They were treating him for plantar fasciitis. It was found that this turned into a triple fracture from doing the exercise for the supposed plantar fasciitis, he was given a knee high boot at this point. After he got the booster, 4 days later, she had to call the ambulance because he couldn't not walk at all on his left foot. He was taken to the hospital where he was told that the fracture was healing and shouldn't because the pain. They kept him for 8 days for observation and now he is in a home due to not being able to walk on that foot. The patient was doing exercise on concrete step for the and she think that the fracture was due to weakness from the Covid. The pain started 4 days after the Covid vaccine. He was withheld lb back then. He was diagnosed 3 months ago with the triple fractures. He was getting therapy now for that. He had his flu and pneumonia shots but there had been no change in the patients foot. The dementia was diagnosed 01Nov2021 but she knew he had it because she lived with him everyday. His mother, her sisters, his brothers all had it. She explains this was going on prior to getting the vaccine.