sweating a lot under her arms; extreme chills with no fever; body aches that were extreme and she could hardly walk; body aches that were extreme and she could hardly walk; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team for a Pfizer sponsored program. The reporter is the patient.  A 72 year-old female patient received bnt162b2 (BNT162B2), intramuscular, administered in arm left, administration date 11Apr2021 09:15 (Lot number: ER8729) at the age of 72 years as dose 2, single for covid-19 immunisation. The patient had no relevant medical history. Concomitant medication(s) included: ADVIL 12 HOUR; SYNTHROID. Vaccination history included: Bnt162b2 (DOSE 1 single, 09:00. Route of administration: Intramuscular, lot no ER8207), administration date: 21Mar2021, when the patient was 72 years old, for Covid-19 immunisation.  The following information was reported: HYPERHIDROSIS (non-serious), outcome "unknown", described as "sweating a lot under her arms"; CHILLS (non-serious), outcome "unknown", described as "extreme chills with no fever"; PAIN (non-serious), GAIT DISTURBANCE (non-serious), outcome "unknown" and all described as "body aches that were extreme and she could hardly walk". Therapeutic measures were not taken as a result of hyperhidrosis, chills, pain, gait disturbance.  Additional information: The patient taking Concomitant Products Advil knee problems. Concomitant Products Synthroid: she has been on for about five years. reporter states call handler is a professional so will not understand but sweating in the head is as a kid and then changes to under arm sweating.  She is over 70 and has never had that change. He states that she always sweats from her head and people thought she was out of the shower.  She never sweated or had an odor so she did not use deodorant.  After the second vaccine, all of a sudden it switched or changed. Her body changed where it was supposed to be. It was a positive thing, maybe there is something to help someone else who has this problem that it would change so drastically that maybe there is an element in there that would help someone in addition to being a vaccine for Covid. she did have extreme chills with no fever and body aches that were extreme and she could hardly walk. That lasted 8 hours maybe, most of the time she was sleeping. Reporter does not provide dates but states that all subsided, and a week later was when she noticed the change as it got hotter. She just knows it was a drastic change for her because after being 70 or over 70 years of having this when it is hot out looks like she came out of the shower her hair would be drenched, she noticed it right away a big change the first day when it got home. Reporter adds this is still going on and she thinks it is a permanent thing. The patient did not received Prior Vaccinations (within 4 weeks) If applicable, list any other vaccinations within four weeks prior to the first administration date of the suspect vaccine. COMMENTS/NARRATIVE: Since puberty when sweating should as a women transfer from head to arm pits - mine never did. After second dose of vaccine this happened. Notifying you as this is a positive reaction and may lead you to treating other than just covid with part or all of the ingredients. Adverse reaction only chills and trouble walking for about 12 hours.   No follow-up attempts are possible. No further information is expected.