Booster; First was having pain in her left arm; Then she started to be sore; there was inflamed skin between her left breast and armpit which from 29Nov2021 is bigger; feeling like needles poking or pinching her but only in the left side.  she still felt the same poking like the needles in her left hip and butt in the left side and her left leg; inflamed skin between her left breast and armpit which from 29Nov2021 is bigger, growing more and it's painful; inflamed skin between her left breast and armpit which from 29Nov2021 is bigger, growing more and it's painful; She also has all of her left leg down; on her left hip feels like very hard pain where she cannot move it at all because it is painful; unable to walk; She also has a very strong headache that makes it hard to think; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 39 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 29Nov2021 10:00 (Lot number: FH8030) at the age of 39 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "Allergic to the weather and pollen and all kinds of stuff" (unspecified if ongoing), notes: Allergic to the weather and pollen and all kinds of stuff; "Allergic to the weather and pollen and all kinds of stuff" (unspecified if ongoing), notes: Allergic to the weather and pollen and all kinds of stuff. Concomitant medication(s) included: CETIRIZINE HCL taken for seasonal allergy, seasonal allergy, start date: 29Nov2021, stop date: 30Nov2021. Vaccination history included: Bnt162b2 (1st dose, lot#EW0161), administration date: 14Apr2021, when the patient was 39 years old, for COVID-19 Immunization, reaction(s): "tired", "The brain felt similar as with this reaction to the booster shot; but was more like a cold, like a blood cold was running in for a little bit", "arm was sore", "had problems to breathe", "feeling the chest, like her heart is tired or her chest is tired"; Bnt162b2 (2nd dose, lot#EW0176), administration date: 05May2021, when the patient was 39 years old, for COVID-19 Immunization, reaction(s): "The brain felt similar as with this reaction to the booster shot; but was more like a cold, like a blood cold was running in for a little bit", "tired", "had problems to breathe", "arm was sore", "feeling the chest, like her heart is tired or her chest is tired". The following information was reported: IMMUNISATION (non-serious) with onset 29Nov2021, outcome "unknown", described as "Booster"; PAIN IN EXTREMITY (non-serious) with onset 29Nov2021, outcome "not recovered", described as "First was having pain in her left arm"; MYALGIA (non-serious) with onset 29Nov2021, outcome "not recovered", described as "Then she started to be sore"; DERMATITIS (non-serious) with onset 29Nov2021, outcome "not recovered", described as "there was inflamed skin between her left breast and armpit which from 29Nov2021 is bigger"; PARAESTHESIA (non-serious) with onset 29Nov2021, outcome "not recovered", described as "feeling like needles poking or pinching her but only in the left side.  she still felt the same poking like the needles in her left hip and butt in the left side and her left leg"; LIMB DISCOMFORT (non-serious) with onset 2021, outcome "unknown", described as "She also has all of her left leg down"; ARTHRALGIA (non-serious) with onset 2021, outcome "unknown", described as "on her left hip feels like very hard pain where she cannot move it at all because it is painful"; GAIT INABILITY (non-serious) with onset 2021, outcome "unknown", described as "unable to walk"; HEADACHE (non-serious) with onset 2021, outcome "not recovered", described as "She also has a very strong headache that makes it hard to think"; BREAST PAIN (non-serious), AXILLARY PAIN (non-serious) all with onset 29Nov2021, outcome "not recovered" and all described as "inflamed skin between her left breast and armpit which from 29Nov2021 is bigger, growing more and it's painful". Relevant laboratory tests and procedures are available in the appropriate section.  Additional information: Concomitant Products Cetirizine HCl. Patient taken it on 29Nov2021 and 30Nov2021, but not on 01Dec2021 or 02Dec2021. Patient did not visited the doctor till the time of reporting because of the event. This reaction really scares her. Normally they let her wait 15 minutes after vaccination in case of a reaction; but this time the nurse not said anything so they just left. Patient was thinking, because the nurse told her that she was a little hard and she was not relaxed completely, so she was assuming that was related to reaction initially; but then the reaction came more and more and she was pretty sure that the event was from the booster shot. Event onset was on 29Nov2021 after she was administered booster shot. First had pain in her left arm which she was assuming ok. Then she started to be sore; then there was inflamed skin between her left breast and armpit which was bigger from 29Nov2021, growing more and it was painful. Evening or night of 29Nov2021 in her neck on left side and in the brain, in the back of the head and all the left side of her head felt like needles poking or pinching her but only in the left side. On 01Dec2021 she was still felling the same poking like the needles in her left hip and butt in the left side and her left leg. She also had all of her left leg down and on her left hip feels like very hard pain where she cannot move it at all because it was painful; she had to stop to walk and everything, then with the pain she was unable to walk which has never happened to her before so it scares her a bit. She also had a very strong headache that makes it hard to think. When walking and everything the headache did not go away for anything. If she had to rate the pain from 1-10 it could be 6-7 right at the time of reporting. On 01Dec2021 was very bad. Outcome unknown, initially reported she thinks still the same; but then clarified that the needles felt in her brain she did not felt on the day of reporting; did not feel the needles feeling anywhere on the day of reporting; but the headache was still strong, pain was still in there and the inflamed sore skin area between her left breast and armpit was still there. She did not think that event will go away. On the day of reporting in the morning when she took a shower she could see inflamed sore skin area between her left breast and armpit was more, bigger and because of the sore area told her husband that she did not think this was going well. No additional Vaccines administered on same date of the Pfizer Suspect. She was supposed to get the flu shot but the nurse did not put it in the system so she did not get the flu shot. Patient not visited Emergency Room and Physician Office. Patient not received prior Vaccinations (within 4 weeks).  No follow-up attempts are possible. No further information is expected.