Dr. did suspect a blood clot; experienced an electrical type sensation of movement that went from my right arm, across my chest, and down to the bottom of my toes; foot pad is swollen; elevated levels of blood test; bottom of foot is painful to walk; bottom of foot is painful to walk; I get light headed; Sitting is equally difficult; my legs fall asleep; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 53 year-old female patient (not pregnant) received bnt162b2 (BNT162B2), administered in arm right, administration date 22Jan2022 09:00 (Lot number: FL3209) at the age of 53 years as dose 3 (booster), single for covid-19 immunisation. The patient's relevant medical history was not reported. Concomitant medication(s) included: FLU, administration date 14Jan2022; TETANUS VACCINE, administration date 14Jan2022. Vaccination history included: Bnt162b2 (Dose Number: 2, Batch/Lot No: FA7485), administration date: 17Jul2021, when the patient was 52 years old, for COVID-19 immunization; Bnt162b2 (Dose Number: 1, Batch/Lot No: EW0202), administration date: 18Jun2021, when the patient was 52 years old, for COVID-19 immunization. The following information was reported: THROMBOSIS (medically significant) with onset 22Jan2022 09:45, outcome "not recovered", described as "Dr. did suspect a blood clot"; ELECTRIC SHOCK SENSATION (non-serious) with onset 22Jan2022 09:45, outcome "not recovered", described as "experienced an electrical type sensation of movement that went from my right arm, across my chest, and down to the bottom of my toes"; PERIPHERAL SWELLING (non-serious) with onset 22Jan2022 09:45, outcome "not recovered", described as "foot pad is swollen"; BLOOD TEST ABNORMAL (non-serious) with onset 22Jan2022 09:45, outcome "not recovered", described as "elevated levels of blood test"; PAIN IN EXTREMITY (non-serious), GAIT DISTURBANCE (non-serious) all with onset 22Jan2022 09:45, outcome "not recovered" and all described as "bottom of foot is painful to walk"; DIZZINESS (non-serious) with onset 22Jan2022 09:45, outcome "not recovered", described as "I get light headed"; SITTING DISABILITY (non-serious) with onset 22Jan2022 09:45, outcome "not recovered", described as "Sitting is equally difficult"; HYPOAESTHESIA (non-serious) with onset 22Jan2022 09:45, outcome "not recovered", described as "my legs fall asleep". The events "dr. did suspect a blood clot", "experienced an electrical type sensation of movement that went from my right arm, across my chest, and down to the bottom of my toes", "foot pad is swollen", "elevated levels of blood test", "bottom of foot is painful to walk", "bottom of foot is painful to walk", "i get light headed", "sitting is equally difficult" and "my legs fall asleep" were evaluated at the physician office visit. The patient underwent the following laboratory tests and procedures: blood test: blood clot; ultrasound scan: unknown results. Therapeutic measures were taken as a result of thrombosis, electric shock sensation, peripheral swelling, blood test abnormal, pain in extremity, gait disturbance, dizziness, sitting disability, hypoaesthesia.  Clinical course: No COVID prior to vaccination. No COVID tested post vaccination. No known allergies. Other medications in two weeks: Penicillin. Patient had Ultrasound on legs.