experiencing pain under her left armpit. It doesn't have any bumps, can be painful at times; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team, Program ID: The reporter is the patient.  A 69-year-old female patient received BNT162b2 (BNT162B2), on 28Dec2021 as dose 2 (booster), single (Batch/Lot number: unknown) for covid-19 immunization. The patient's relevant medical his-tory included: "Johnson covid-19 vaccine/Pfizer booster" (unspecified if ongoing), notes: initial Covid vaccine was Johnson and Johnson, and then she had the Pfizer Covid booster. The patient's concomitant medications were not reported. Vaccination history included: Johnson covid-19 vac-cine (Dose:1), for COVID-19 Immunization. The following information was reported: AXILLARY PAIN (non-serious), outcome "unknown", described as "experiencing pain under her left armpit. It doesn't have any bumps, can be painful at times". Relevant laboratory tests and procedures are available in the appropriate section. Additional information: Call transferred from agent withheld, in  Medical Information, INT withheld. Agent stated the Caller called about the Pfizer Covid 19 vaccine. Agent clarified that this was a follow up, a phone call, back to the Caller from Medical Information after she submitted a non phone inquiry online. Agent stated the Caller inquired about a side effect that she experienced. Agent stated the Caller reported that she had pain under her left armpit, without any bumps or nodules. Agent stated the Caller reported she had a mammogram and and ultrasound done, and they both were negative. Agent stated the Caller's primary Covid vaccine was Johnson and Johnson, and then she got the Pfizer Covid 19 booster, on 28Dec2021. Agent stated that Caller reported, some people were having the same experiences with the vaccine that she was having, but did not provide any further details. Agent stated that the Caller wanted to speak with someone on a higher level for further treatment recommendations. Warm transfer. Caller stated that she called about the Pfizer Covid vaccine booster, and her issue has been going on for months. Caller stated that she had been to the doctor and has had a mammogram and ultrasound, to make sure she had no nodules. Caller stated that some people were having issues with their lymph nodes under their arm, after the Covid vaccine. Caller does not provide specific details or identifiers. Caller stated her initial Covid vaccine was Johnson and Johnson, and then she had the Pfizer Covid booster. Caller stated she sent an email to Pfizer asking for acknowledgement and recommended treatment for this event, and asked what is Pfizer calling this event. Caller stated that she already spoke to a Medical Information agent and he could not help her and transferred her. Caller stated she wants to speak to someone in upper management. Caller stated that agent withheld, in Medical Information called her back regarding her questions, so her events were already documented and she doesn't have to complete this report. Caller stated that agent withheld, called her back but he could not answer any of her questions, so why should she be transferred back there. Caller abruptly disconnected from line on 09May2022.  The information on the batch/lot number for BNT162b2 has been requested and will be submitted if and when received.