This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). A 29 year-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Lot number: FF2589), administration date 10Sep2021 07:00 at the age of 29 years as dose 1, single for Covid-19 immunization. The patient had no relevant medical history. There were no concomitant medications. The following information was reported: LYMPHADENITIS (non-serious) with onset Sep2021, outcome "unknown", described as "something like inflammation of the left side of the lymph nodes"; CONDITION AGGRAVATED (non-serious) with onset Sep2021, outcome "unknown", described as "getting progressively worse"; AXILLARY PAIN (non-serious) with onset Sep2021, outcome "unknown", described as "the armpit it's extending its radiating towards the back towards her neck and also towards her left breast"; INFLAMMATION (non-serious) with onset 11Sep2021, outcome "unknown", described as "getting more inflammation"; PAIN (non-serious) with onset Sep2021, outcome "unknown", described as "more pain". Therapeutic measures were taken as a result of lymphadenitis, condition aggravated, axillary pain, inflammation, pain. Additional information: Dates for She was having something like inflammation of the left side of the lymph nodes, it was getting progressively worse; situation continues to get worse, she was getting more inflammation more pain: (From: Unspecified To: Unspecified). Reporter seriousness for She was having something like inflammation of the left side of the lymph nodes, it was getting progressively worse; situation continues to get worse, she was getting more inflammation more pain: Unspecified. Dates for Her left side, her left arm, the armpit it was extending its radiating towards the back towards her neck and also towards her left breast: (From: Unspecified To: Unspecified). Reporter seriousness for Her left side, her left arm, the armpit it was extending its radiating towards the back towards her neck and also towards her left breast: Unspecified. Reporter stated, "She was calling on behalf of her wife she was not fluent as she was in English therefore even though she was right next to her she was the one who was making the call. "Reporter stated, "Her wife and she got the COVID 19 Vaccine a few days ago and of course  She worked in Pharmaceutical industry, so she pretty much understand the process that you are engaging in right now and when she got the vaccine of course she understand about 30% of the people show some local lite side effect but she was having something like inflammation of the left side of the lymph nodes. "When paraphrased the above concern, Reporter stated, "Yes her left side, her left arm, the armpit it was extending its radiating towards the back towards her neck and also towards her left breast. "Reporter Type: Reporter stated, "As she said she was an Executive Therapeutic Specialist Gilead in (#). When probed for was it the first time calling in Pfizer Drug Safety, Reporter stated, " Yes that was the first time we manage the expected side effect with Tylenol PRN (Further clarification unknown) or as needed but as she said situation continues to get worse, she was getting more inflammation more pain and she was going through apply some ice but she felt, she needed to give you a call and recorded. Exact date of adverse event: Reporter stated, "Inflammation started on Saturday night and it progressively getting worse. "Treatment: Reporter stated, "The only thing she is taking was Tylenol and ice now She was going to put her on ice." Lab Test: Reporter stated, "She didn't have any medical History in fact she was a very healthy human being she was a health conscious person she trained 5- 6 times a week. "Call was put on hold to gather further information, however call get disconnected further probing could not be done. Call back was done to gather further information however it was unsuccessful. Follow-up attempts are completed. No further information is expected.