Doesn't believe patient's pain has gotten any worse since the booster shot; Doesn't believe patient's pain has gotten any worse since the booster shot; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP).  A 71 year-old male patient received bnt162b2 (COMIRNATY), administered in arm left (Batch/Lot number: unknown) at the age of 71 years as dose 3 (booster), single for covid-19 immunisation. The patient's relevant medical history was not reported. There were no concomitant medications. Vaccination history included: Bnt162b2 (Dose 1), administration date: Dec2020, for COVID-19 immunization, reaction(s): "pyrexia"; Bnt162b2 (Dose 2), administration date: Jan2021, for COVID-19 immunization, reaction(s): "arthritic pain in the distal interphalangeal joints of both hands", "arthritic pain in the distal interphalangeal joints of both hands", "pyrexia/Fever". The following information was reported: IMMUNISATION (non-serious), PAIN (non-serious), outcome "unknown" and all described as "Doesn't believe patient's pain has gotten any worse since the booster shot". Therapeutic measures were taken as a result of pain.  Additional information: Soon after the second dose of Comirnaty vaccine, did not know if hours or days, patient reported pain in  distal finger joints on both hands. Patient had no history of arthritis. The reporter clarified the details provided by the transfer agent stating it was the distal inter-phalange joint. Thinks maybe it was an inflammatory response. Patient would had thought as time progressed that it would reverse or lessen, but it hadn't. Reporter told him to call Pfizer several times, but he hadn't done it. States if patient really did feel it was related, should report it or if other people was the same side effect, Pfizer will have record of this. Again, was not sure at this point whether patient feels it was getting worse. Patient did mention the pain regularly, but reporter was not sure if the pain was persisting/improving/worsening. Patient knows patient's pain was really bad because was putting Voltaren on it. Reporter did not  think the Voltaren helped much. Patient didn't get any pain after the first dose. It was only after the second dose. Reporter did not recall patient had any severe reactions with either dose. Patient had some pyrexia, the usual things that a person gets after the first and second dose. Patient was not really sick. Thinks patient got chills and fever and it went away. Nothing that reporter would think was unusual. Reporter had her first dose in Dec2020 and second dose in Jan2021 thinks the patient had his first dose in middle of Jan2021 and second dose in Feb2021. Patient mentioned recently that should see someone about the pain, which was unlike him. Reporter thinks the pain must be bothering the patient significantly. Patient had the booster dose just recently. Did not believe patient's pain had gotten any worse since the booster shot, but hadn't actually asked the patient that. States it was interesting and thinking maybe a person would get an initial flare up, but she didn't know how the physiology works. Confirmed patient did  not have the NDC/LOT/EXP for booster to provide. The patient did not receive any other vaccines within 4 weeks prior to the COVID vaccine. No AE(s) following prior vaccinations. Agent informed reporter they had some reports of worsening joint pain, but nothing indicated in particular. Patient was going to provide patient the phone number. Patient had been experiencing distal inter-phalange joint pain. Was using Voltaren for the pain.  The lot number for bnt162b2 was not provided and will be requested during follow up.