He took the booster dose on Friday; Swollen lymph nodes; I've been experiencing rashes or hives all over my upper body; I've been experiencing rashes or hives all over my upper body; Pain near my left armpit; Left arm has pain; 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 31 year-old male patient received bnt162b2 (BNT162B2), administered in arm left, administration date 19Nov2021 (Lot number: FJ1620) at the age of 31 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 (1st Dose), administration date: 2021, when the patient was 31 years old, for COVID-19 Immunization; Bnt162b2 (2nd Dose), administration date: 2021, when the patient was 31 years old, for COVID-19 Immunization. The following information was reported: IMMUNISATION (non-serious) with onset 19Nov2021, outcome "unknown", described as "He took the booster dose on Friday"; LYMPHADENOPATHY (non-serious) with onset 2021, outcome "unknown", described as "Swollen lymph nodes"; RASH (non-serious), URTICARIA (non-serious) all with onset 2021, outcome "unknown" and all described as "I've been experiencing rashes or hives all over my upper body"; AXILLARY PAIN (non-serious) with onset 2021, outcome "unknown", described as "Pain near my left armpit"; PAIN IN EXTREMITY (non-serious) with onset 2021, outcome "unknown", described as "Left arm has pain". Therapeutic measures were taken as a result of lymphadenopathy, rash.  Additional information: Consumer stated he has side effects from the Pfizer COVID vaccine booster dose. Caller states, "Patient took the booster dose on Friday 19Nov2021 and on Sunday, Patient experiencing rashes or hives all over my upper body and pain near my left armpit, which I believe correlates to swollen lymph nodes on the same side of my vaccination site. Consumer stated, he had a concern and some follow up questions regarding the Pfizer COVID-19 Booster dose. He had received the dose on Friday and at this Sunday and today he experienced certain side effects of the vaccine booster dose that he had not experienced on the 1st two doses. Specifically he have been experiencing pain in my lower arm pit near the lymph nodes and  rashes 'occurring'(not clear) to hives all over my upper body. He wanted to a report this and b get some follow up information on how long it will take to subside based on your empirical data." Consumer stated, "The query was just that how long would it take to subside because he had been unable to get that information from the available open-source documentation online. So he thought he might as well report it and then if he would not get any information he could at least have you point me to the right resource instead of going to ER, urgent care and get that information that he could have gotten online. he sure the studies have been done he just curious if you can point me to right." Treatment: Consumer stated, "Yesterday he had to eat an anti-histamine for the rashes and Ibuprofen for lymph node swelling, but it was yesterday."  Follow-up attempts are completed. No further information is expected.