Muscle spasms, muscle cramping, and severe pain / Started in right side back of neck/shoulder, went to feet/legs/toes (this has been worst areas) / bilateral- different spots at different times / Cramping sometimes multiple spots at the same time; Having muscle spasms, muscle cramping, and severe pain / Started in right side back of neck/shoulder, then went to feet/legs/toes (this has been worst areas); Some days ok, other days can barely walk (Sometimes feel like legs just aren't working); This is a spontaneous report from a contactable reporter (consumer or other non-HCP). The reporter is the patient.  A 47-year-old female patient (not pregnant) received bnt162b2 (BNT162B2), administered in arm left, administration date 01Jun2021 at 18:30 (Lot number: EW0182) at the age of 47 years as dose 2, single for COVID-19 immunisation. Relevant medical history included: "Blood pressure high" (unspecified if ongoing), notes: HBP; "Obesity" (unspecified if ongoing) and "Penicillin allergy" (unspecified if ongoing), notes: Known allergies: Penicillin. There were no concomitant medications. Past drug history included: Enalapril, reaction: "Drug allergy", notes: Known allergies: Enalapril and Levaquin, reaction: "Drug allergy", notes: Known allergies: Levaquin. Vaccination history included: Bnt162b2 (DOSE 1, SINGLE; Lot number: ER8731; Anatomical site: Right arm; Administration time: 18:30), administration date: 11May2021, when the patient was 47 years old, for COVID-19 immunisation.  The following information was reported: MUSCLE SPASMS (non-serious) with onset 18Jun2021 at 19:00, outcome "recovering", described as "Muscle spasms, muscle cramping, and severe pain / Started in right side back of neck/shoulder, went to feet/legs/toes (this has been worst areas) / bilateral- different spots at different times / Cramping sometimes multiple spots at the same time"; MYALGIA (non-serious) with onset 18Jun2021 at 19:00, outcome "recovering", described as "Having muscle spasms, muscle cramping, and severe pain / Started in right side back of neck/shoulder, then went to feet/legs/toes (this has been worst areas)"; GAIT DISTURBANCE (non-serious) with onset 18Jun2021 at 19:00, outcome "recovering", described as "Some days ok, other days can barely walk (Sometimes feel like legs just aren't working)". The events "Muscle spasms, muscle cramping, and severe pain / Started in right side back of neck/shoulder, went to feet/legs/toes (this has been worst areas) / bilateral- different spots at different times / Cramping sometimes multiple spots at the same time", "Having muscle spasms, muscle cramping, and severe pain / Started in right side back of neck/shoulder, then went to feet/legs/toes (this has been worst areas)" and "Some days ok, other days can barely walk (Sometimes feel like legs just aren't working)" were evaluated at the physician's office and emergency room visit. Therapeutic measures were taken as a result of muscle spasms, myalgia and gait disturbance.  Additional Information: At this point the events were primarily on the right side only. PCP wanted the patient to see neurology. Therapeutic measures included muscle relaxers which the patient was unable to tolerate and was referred to neurology. The patient did not receive any other vaccines within four weeks prior to the COVID vaccine. Prior to the vaccination, it was unknown whether the patient was diagnosed with COVID-19. Since the vaccination, the patient had not been tested for COVID-19.