cramps in feet; pain in toes / it's hard to lift up her toes; as soon as she bends her toes back down she gets a pain; tried to lift her foot and they were slow to lift up; right leg seemed to take longer when she was walking; numbess and tingling in upper and lower extremities; numbess and tingling in upper and lower extremities; restless leg syndrome; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 64-year-old female patient received BNT162b2, BNT162b2 omi ba.4-5 (BNT162B2, BNT162B2 OMI BA.4-5), on 20Oct2022 as dose 5 (booster), single (Lot number: 653277) at the age of 64 years, in right arm for covid-19 immunisation. The patient's relevant medical history included: "Fibromyalgia", start date: 1999 (ongoing); "Pain" (unspecified if ongoing); "Sleep" (unspecified if ongoing), notes: Indication as Reported by the Primary Source: Sleep. Concomitant medication(s) included: ALEVE taken for pain (ongoing); XANAX taken for feeling of relaxation (ongoing); AMBIEN taken for sleep disorder (ongoing); FLU VACCINE VII taken for immunisation, start date: 08Oct2022 at 09:05, stop date: 08Oct2022 at 09:05. Vaccination history included: BNT162b2 (Pfizer Covid vaccine, 1st dose received on 20Jan2021, at the hospital. , Lot: EL3246, NDC/Expiry: Unknown), administration date: 20Jan2021, when the patient was 63-year-old, for COVID-19 Immunization; bnt162b2 (2nd dose received on 8Feb2021, at the hospital., Lot: EL9265, NDC/Expiry: Unknown), administration date: 08Feb2021, when the patient was 63-year-old, for COVID-19 Immunization; BNT162b2 (3rd dose, a booster received on 14Oct2021 , Lot: FE3952, NDC/Expiry: Unknown, There is the number 1.76 written by that dose, but she doesn't know what this number is.), administration date: 14Oct2021, when the patient was 63-year-old, for Covid-19 immunization; BNT162b2 (4th dose, a booster received on 3Jun2022., Lot: FM0173, NDC/Expiry: Unknown), administration date: 03Jun2022, when the patient was 64-year-old, for Covid-19 immunization. The following information was reported: HYPOAESTHESIA (non-serious), PARAESTHESIA (non-serious) all with onset 21Oct2022, outcome "not recovered" and all described as "numbess and tingling in upper and lower extremities"; RESTLESS LEGS SYNDROME (non-serious) with onset 21Oct2022, outcome "not recovered", described as "restless leg syndrome"; MUSCLE SPASMS (non-serious) with onset 01Nov2022, outcome "not recovered", described as "cramps in feet"; PAIN IN EXTREMITY (non-serious) with onset 01Nov2022, outcome "not recovered", described as "pain in toes / it's hard to lift up her toes; as soon as she bends her toes back down she gets a pain"; GAIT DISTURBANCE (non-serious) with onset 01Nov2022, outcome "not recovered", described as "right leg seemed to take longer when she was walking"; LIMB DISCOMFORT (non-serious) with onset 01Nov2022, outcome "not recovered", described as "tried to lift her foot and they were slow to lift up". Relevant laboratory tests and procedures are available in the appropriate section.  Additional information: Calling about the Covid 19 vaccine, the recent booster that just came out. On 20Oct2022 at around 9am, she went to get the booster. It was her 5th dose of the vaccine. She had previously gotten all the others with no problem. 24 hours later she started experiencing numbness and tingling in her upper and lower extremities, almost like an electric shock. Her left leg had restless leg syndrome as well. States that she tried to wait it out to see what happened and if it would get better, but it had not. Now, when she bends her feet, she was getting cramps in her feet, and it was hard to lift up her toes as soon as she bends her toes back down she gets a pain. States that she went to church and the grocery store today and noticed that her right leg seemed to take longer when she was walking. She came home and was laying on the couch when she noticed that her feet were feeling funny. She bent her foot and started to get pain in her toes. She tried to lift her foot and they were slow to lift up. States this had happened within the last hour; and she had an eerie feeling like weakness and numbness. Is anyone else experiencing this. Is this something that will let up, or will it get worse. If she goes to her doctor, he will ship her off to a neurologist. But if she knows that other people had experienced this then she will wait another week or so before she goes to the doctor. States that she was reading about the side effects of the vaccine and found that Guillain-Barre syndrome could be a possible side effect. States she will never get this vaccine again. States she just went to the doctor that same week prior to getting the 5th dose, and all her bloodwork was fine. Received a Flu shot on 8Oct2022 at 9:05am, from her primary care doctor, Dr. (Withheld).  No follow-up attempts are possible. No further information is expected.