improves her energy; correlation between the Pfizer Vaccine and my Medical issue, could it have something to do with the TSH; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 63 year-old female patient received bnt162b2 (BNT162B2), administration date 13Dec2021 14:00 (Lot number: FJ8757) as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "fatigue" (unspecified if ongoing), notes: she suffers with fatigue and pain due to Hashimoto's also known as Graves disease; "pain" (unspecified if ongoing), notes: she suffers with fatigue and pain due to Hashimoto's also known as Graves disease; "Graves disease" (unspecified if ongoing), notes: she suffers with fatigue and pain due to Hashimoto's also known as Graves disease. The patient's concomitant medications were not reported. Vaccination history included: Bnt162b2 (Dose 1, each time she takes the vaccine even though she suffers with fatigue and pain due to Hashimoto's also known as Graves disease she feels better.), for Covid-19 immunization, reaction(s): "improves her energy"; Bnt162b2 (Dose 2, each time she takes the vaccine even though she suffers with fatigue and pain due to Hashimoto's also known as Graves disease she feels better.), for Covid-19 immunization, reaction(s): "improves her energy". The following information was reported: THERAPEUTIC RESPONSE UNEXPECTED (non-serious), outcome "unknown", described as "improves her energy"; THYROID DISORDER (non-serious), outcome "unknown", described as "correlation between the Pfizer Vaccine and my Medical issue, could it have something to do with the TSH".  Additional information: Caller stated she is a 63 year old black female. Caller stated she has taken all three shots of the Pfizer COVID vaccine. Caller stated she took the booster dose today but each time she took the vaccine even though she suffered with fatigue and pain due to Hashimotos also known as Graves disease she felt better. Caller stated when she took the vaccine it improved her energy. Caller would like to know what is the correlation between the vaccine and her improved energy. Caller stated has anyone else reported this. Caller she thought at first it was just nerves from all the hype around the vaccine but it lasted for days and months with the first dose and then happened again with the second dose but for the third dose it took longer to kick in. Caller stated she took the booster dose today around 2 pm and it just kicked in about an hour ago. Dates for Improved Energy: (From: Unspecified To: Unspecified). Dates for correlation between the Pfizer Vaccine and my Medical issue, could it have something to do with the TSH: (From: Unspecified To: Unspecified). She was calling regarding the Pfizer BioNTech Covid-19 Vaccine, she stated that she received all three doses and it seemed to have improved her energy and she wanted to know the correlation between the vaccine and her improved energy, she had the side effects that was not listed. She just supposed to someone who also suffer with, she wrote issue and she said she was having some.  The one she took today was LOTFJ8757. She did not see anything expiration date. She wanted to know what was the correlation between the Pfizer Vaccine and my Medical issue, could it have something to do with the TSH, so, that is the level of thyroid if T3 and T4, could it be the stimulating though.  No follow-up attempts are needed. No further information is expected.