diarrhea; back pain; joint pain in his knee, shoulder, and waist; headache; felt more like burning; sweating a lot; toes have pain; having to drink a lot of water; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) via Pfizer-sponsored program (159558). The reporter is the patient.  A 50 year-old male patient received bnt162b2 (BNT162B2), administered in arm left, administration date 13Aug2021 (Lot number: EW0179) at the age of 50 years as dose 2, single for covid-19 immunisation. The patient's relevant medical history was not reported. There were no concomitant medications. Vaccination history included: Bnt162b2 (History of all previous immunization with the Pfizer vaccine considered as suspect:, Vaccine Name: Pfizer COVID 19 vaccine, Lot Number / Expiry Date: EW0179/AUG2021, Route, Anatomical Location: injection/left shoulder, No. of Previous Doses: none, Date: 23JUL2021), administration date: 23Jul2021, when the patient was 50 years old, for COVID-19 IMMUNIZATION. The following information was reported: DIARRHOEA (non-serious) with onset 14Aug2021, outcome "recovered", described as "diarrhea"; BACK PAIN (non-serious) with onset 14Aug2021, outcome "recovering", described as "back pain"; ARTHRALGIA (non-serious) with onset 14Aug2021, outcome "recovering", described as "joint pain in his knee, shoulder, and waist"; HEADACHE (non-serious) with onset 14Aug2021, outcome "recovered", described as "headache"; BURNING SENSATION (non-serious) with onset 14Aug2021, outcome "not recovered", described as "felt more like burning"; HYPERHIDROSIS (non-serious) with onset 14Aug2021, outcome "not recovered", described as "sweating a lot"; PAIN IN EXTREMITY (non-serious) with onset 14Aug2021, outcome "recovering", described as "toes have pain"; THIRST (non-serious) with onset 14Aug2021, outcome "unknown", described as "having to drink a lot of water". It was unknown if therapeutic measures were taken as a result of diarrhoea, back pain, arthralgia, headache, hyperhidrosis, pain in extremity, thirst.  Additional information: Question: Received a transfer call from agent (Name) . Call was a transfer from Pfizer COVID-19 Vaccine Call Center per  agent. Caller is a 50 year old male who received his first dose of the Pfizer COVID-19 vaccine on 23Jul2021 and the second dose on 13Aug2021. Caller has complaints of back pain and joint pain in his knee, shoulder, and waist after receiving the second dose. Caller stated that he also had complaints of headache and diarrhea after the second dose but those complaints are resolved now per Caller. Caller is asking if his complaints are from the Pfizer Covid-19 vaccine? Question: Caller received the second dose of the Pfizer Covid-19 vaccine on 13AUG2021. Caller is scheduled to have a COVID-19 test and is asking about information about getting a COVID-19 test after receiving a dose of the Pfizer Covid-19 vaccine? Viral tests are used to see if you have a current infection.2 The Pfizer-BioNTech COVID-19 Vaccine will not cause you to test positive on viral tests.2 The following website has information on viral tests for current infection with COVID-19 Dates for Back pain: (From: 14Aug2021 To: Ongoing) Dates for Joint pain: (From: 14Aug2021 To: Ongoing) Dates for felt more like burning: (From: 14Aug2021 To: Ongoing) Dates for sweating a lot: (From: 14Aug2021 To: Ongoing) Dates for toes have pain: (From: 14Aug2021 To: Ongoing) Dates for having to drink a lot of water: (From: Unspecified To: Unspecified) Additional Context: Warm transfer from CEP-159558. Caller reports he had back pain and joint pain after the second dose Pfizer COVID 19 vaccine eight days ago. Are they from the vaccine? Agent provided the number. provided from vaccination card. Second dose on 13AUG2021 at 1830PM in the left shoulder; lot EW0198 mentions there is a little bit of scratching on the number. Expiration date not provided for second dose.  Event: Caller reports two days later; after the second dose on Friday; on Saturday night he had back and joint pain. He laid down and he felt more like a burning; he was sweating a lot; and even his toes have pain too. Today he is a little better now. Adds it is just in the night still when he lays down on his back he starts sweating a lot and has to drink a lot of water. Treatment: When ask if he has sought treatment at the ER or a doctor or received any treatment he states not yet.VACCINE SUPPLEMENTAL FORM Additional Vaccines Administered on Same Date of the Pfizer Suspect: none. Adverse Event (AE) Details: Provide the time of onset of AE(s): Adverse Event: Back pain; Joint pain; felt more like burning; sweating a lot; toes have pain; having to drink a lot of water. Time of Onset: (24-hour clock): 14Aug2021 nighttime. Additional Information: Did any AE(s) require a visit to: Emergency Room? No, Physician Office? No, Prior Vaccinations (within 4 weeks): none, AE(s) following prior vaccinations: None, Patient's Medical History (including any illness at time of vaccination)? None, Family Medical History Relevant to AE(s): none, Relevant Tests: None  Follow-up attempts are completed. No further information is expected.