Sweating profusely/sweating like water running down her head; started to feel sick, very sick; this felt was just like having the flu; had aches and pains everywhere, there was nothing that didn't ache from her toes, to her fingers, to the back of her head.; a big hive on her left arm way below where the injection site is that didn't come out until Saturday, and it was very hot and very itchy; a big hive on her left arm way below where the injection site is that didn't come out until Saturday, and it was very hot and very itchy; Swelling arm; Chills; Fever; This is a spontaneous report from a contactable consumer (the patient). This 79-Year-old female patient received second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Lot Number: EL9264 and expiry: not reported) via an unspecified route of administration at arm left on 03Feb2021 as single dose for COVID-19 immunization (Product strength and count size dispensed: second dose, one injection). Relevant medical history included high blood pressure (diagnosed many years ago, 10-15 years, maybe more), knee surgery (she had this a few years ago), arthritis, rheumatic fever. She used to be taller, and her height changed long before she got the vaccine, she had gotten shorter as she got the older investigation. Assessment was not done. Her thyroid slowed down, so about 2.5 months ago during a general checkup her doctor had bloodwork done and all that good stuff, and he called her after to say her thyroid numbers were very low, and she had to take levothyroxine sodium (SYNTHROID, she didn't know that existed). She was diagnosed with arthritis after she had felt that way since she was a child, she had rheumatic fever as a kid, and she grew up, and she can't remember having a time that her bones were not hurting. Concomitant medications: She was taking a medication for arthritis and one for her stomach, but those are long existing meds, nothing new, only thing new in recent months was Synthroid for her thyroid. She took some sort of mild arthritis medication for arthritis, but she was ok, she could not say it enough that she was thankful to be ok. She started Synthroid two and a half months ago (wouldn't have NDC/LOT/EXP on it since it was not a manufacturer bottle). Previous Medications: First dose of BNT162B2 via an unspecified route of administration, administered in arm left on 12Jan2021 (Batch/Lot Number: EL3248/ MHA121, Expiry Mar2021) as single dose for Covid-19 immunization. She got her vaccine doses at a medical center near where she lives in, they gave her both COVID-19 vaccine injections. The NDC/EXP were not provided on the card for either dose of the vaccine. She had not had any other recent vaccinations or started any new medications. The patient wanted to let someone know how terrible she felt. She said she got vaccine a week ago on 03Feb2021 (Wednesday), and now she felt better, but she still felt it. She says Wednesday and Thursday she was fine, then on 05Feb2021 (Friday) and Saturday (06Feb2021) the patient started to feel sick, very sick, and she didn't know what to do or where to go. She took Tylenol, and when she went to her doctor on Monday (08Feb2021), they said that was all she could do. It got worse every day, after. She didn't feel sick the day of vaccination, she got it or the day after. She said she felt so bad that she looked at the list they gave her at the hospital when she got the vaccine, and thought it was bizarre. There was nothing on the side effect list that she didn't have. In Feb2021, she had a big hive on her left arm way below where the injection site was that didn't come out until Saturday, it was very hot and very itchy, she was uncomfortable, and had aches and pains everywhere, there was nothing that didn't ache from her toes, to her fingers, to the back of her head. She took extra Strength, Tylenol 1000mg every six hours, three times a day for Saturday, Sunday, Monday, Tuesday (09Feb2021), so four and a half days because she took it for half the day yesterday (10Feb2021). She only experienced she had that was not on the list was that she started sweat profusely on 09Feb2021 (Tuesday) and Wednesday (10Feb2021) and a little Thursday. In Feb-2021, she had hives, swelling arm, chills, aches, and she was sweating like water running down her head like when she was younger and had the flu really bad before they started giving flu shots every year and the way this felt was just like having the flu. She says that maybe her sweating may have been because she had little fever in Feb-2021. On 11Feb2021 (Today) she felt much more like herself and she was moving around and was sweating a little bit, but she was much more comfortable. People in her family also got the shot and felt a little achy maybe but were not sick like she was (No further details provided about the people in her family). On 06Feb2021 (Saturday) afternoon her hive was much cooler, not as big, and not itchy like it was. She asked if anyone else reported having sweating. Therapeutic measures were taken as a result of just like having the flu, aches and pains everywhere, started to feel sick, very sick, chills and fever. Outcome of the events was recovering for sweating, hives, very itchy and unknown for rest of the events.