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 68-year-old male patient received BNT162b2 (BNT162B2), on 29Jul2022 as dose 4 (booster), single (Batch/Lot number: unknown) for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. Vaccination history included: Bnt162b2 (DOSE: 3, First Booster, Caller reports the first booster he had some side effects that were on the Fact Sheet like tired, muscle pain), for Covid-19 Immunization, reaction(s): "tired", "muscle pain"; Bnt162b2 (DOSE: 2, total of 4 Pfizer Covid 19 Vaccines, first two vaccines he didn't have any problem), for Covid-19 Immunization; Bnt162b2 (DOSE: 1, total of 4 Pfizer Covid 19 Vaccines, first two vaccines he didn't have any problem), for Covid-19 Immunization. The following information was reported: VACCINATION SITE PAIN (non-serious), outcome "unknown", described as "injection site pain"; FATIGUE (non-serious), outcome "unknown", described as "more tired & lasting longer"; MYALGIA (non-serious), outcome "unknown", described as "muscle pain"; ARTHRALGIA (non-serious), outcome "unknown", described as "joint pain"; PYREXIA (non-serious), outcome "unknown", described as "fever"; NAUSEA (non-serious), outcome "unknown"; VACCINATION SITE SWELLING (non-serious), outcome "unknown", described as "noticed his left arm/left elbow (arm he received the injection) had swelling like a "ball"". Additional information: Per (Name withheld) the caller reports that he received his second booster of the Pfizer Covid 19 Vaccine completing a total of 4 Pfizer Covid 19 Vaccines. Caller asking if side effects or symptoms or has anyone reported what he is experiencing. Per (Name withheld) the caller didn't provide any symptoms that he is experiencing. When this agent spoke with the caller, he voiced this past Friday he received his shot about 11:30 am or 12pm. Per caller the first two vaccines he didn't have any problem. Caller reports the first booster he had some side effects that were on the Fact Sheet like tired, muscle pain. Caller reports with this vaccine injection site pain, more tired & lasting longer, muscle pain, joint pain, fever, and nausea. Symptoms started Friday night. On Saturday the symptoms were off and on. Then Sunday the symptoms became worse. Today symptoms are better. Per caller on Sunday evening all of a sudden he noticed his left arm/left elbow (arm he received the injection) had swelling like a "ball." Caller described it 1/2 size of a tennis ball or golf ball. Caller voiced the area feels "squish" only the elbow per caller "like fluid in joint." Per caller he will see the Orthopedic on Wednesday. Caller asking if fluid in the joint has been reported? Caller asking why he has more symptoms with the fourth dose? When speaking from the attached document on symptoms caller voiced some of the symptoms his pharmacist said people are reporting to her. E-Transmitting, Potential Duplicate AE (68 year old/Male). As of follow-up 01Aug2022, Caller had 2nd booster shot for the Pfizer COVID vaccine on Friday, confirmed that was caller's 4th total dose of the Pfizer COVID vaccine. Caller has questions, received the sheet from the pharmacy about possible side effects and wants to know if caller has a side effect or symptom from the vaccine or if anyone else has reported what caller is experiencing. Caller declined to provide additional details about what the side effect is caller is experiencing. Declined to provide additional reporter details or complete a report. Requested to get transferred. No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.