my underarms started to become really sore; The soreness extends to my upper chest and back.; The soreness extends to my upper chest and back.; I also experience cold sweats during the night and day.; The soreness strangely enough has been in both of my arms.; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 43-year-old male patient received BNT162b2 (BNT162B2), on 10Feb2022 as dose 3 (booster), single (Lot number: FK9729) at the age of 43 years, in right arm for covid-19 immunisation. The patient's relevant medical history included: "Known allergies: Sulfa medications" (unspecified if ongoing); "Hypertension" (unspecified if ongoing). Concomitant medication(s) included: BENICAR; ZOLOFT. Past drug history included: Known allergies: form of zoloft, reaction(s): "Known allergies: Generic form of Zoloft". Vaccination history included: BNT162b2 (dose 2 single, Batch/Lot No: EP7533, Location of injection: Arm Left), administration date: 20Jun2021, when the patient was 42-year-old, for Covid-19 Immunization, reaction(s): "I experienced little to no symptoms"; BNT162b2 (dose 2 single, Batch/Lot No: FW0179, Location of injection: Arm Left), administration date: 12May2021, when the patient was 42-year-old, for Covid-19 Immunization, reaction(s): "I experienced little to no symptoms". The following information was reported: COLD SWEAT (non-serious) with onset 25Feb2022, outcome "not recovered", described as "I also experience cold sweats during the night and day."; CHEST PAIN (non-serious), BACK PAIN (non-serious) all with onset 25Feb2022, outcome "not recovered" and all described as "The soreness extends to my upper chest and back."; PAIN IN EXTREMITY (non-serious) with onset 25Feb2022, outcome "not recovered", described as "The soreness strangely enough has been in both of my arms."; AXILLARY PAIN (non-serious) with onset 25Feb2022, outcome "not recovered", described as "my underarms started to become really sore". The events "my underarms started to become really sore", "the soreness extends to my upper chest and back.", "i also experience cold sweats during the night and day." and "the soreness strangely enough has been in both of my arms." required physician office visit. Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were not taken as a result of axillary pain, chest pain, back pain, cold sweat, pain in extremity.  Additional information included: Patient experienced little to no symptoms from the 1st and 2nd shots. Those first two were administered into her left arm. The 3rd shot was administered to her right arm. About two weeks after the booster my underarms started to become really sore. The soreness extends to my upper chest and back. She also experienced cold sweats during the night and day. The soreness strangely enough has been in both of her arms. Though the soreness is mostly in her right underarm there is still significant pain in her left to bring to your attention Her, theory was that the 3rd dose somehow not only activated the lymph nodes in her right arm at the site of the booster; but also at the sites where her initial 2 doses were given in her left arm. Currently she wrote this at almost the second month from receiving the 3rd dose and about six weeks from the onset of symptoms to where she did not feel like she was getting better. The patient did not receive any other vaccine with in four weeks. Other medications in two weeks includes Benicar and Zoloft. Prior to the vaccination, the patient was not diagnosed with covid-19. Post vaccination, the patient was tested for Covid-19 on 8Apor2021, Nasal Swab test (Covid-19 at-home test) which was found to be negative. No follow-up attempts are possible. No further information is expected.