joint pain and muscle; joint pain and muscle; Vertigo; an itchy rash bilaterally on her arms; developing swollen, tender, and hard lymph nodes under the Left subclavian area/ swollen left subclavian lymph nodes; developing swollen, tender, and hard lymph nodes under the Left subclavian area; extreme fatigue; Runny nose; Headache; This is a spontaneous report from a contactable nurse (RN) reporting for herself. A 42-year-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE) first dose on 23Dec2020 h 09:00 intramuscularly in left deltoid (left arm) lot number: EK5730 at single dose for COVID-19 immunization. Concomitant medications were not provided. Patient stated that she has had double mastectomy, and missing a lot of lymph nodes, states she got the first dose of Pfizer Covid vaccine on 23Dec2020, states it made her left subclavian lymph nodes swollen and hard. States that when she gets the flu vaccine at her hospital every year, she gets swollen lymph nodes ever since she had a double mastectomy and chemotherapy. She originally was wondering if she could get the vaccine in another large muscle group. States she even went as far as to cross reference flu shot ingredients with the Pfizer Covid ingredients to see if something in the vaccines were causing the swollen lymph nodes but was unable to come to any conclusion, the only think in common is the Sodium Chloride and she does not feel like that would cause any issue. States the swollen lymph nodes occurred after the Sanofi brand flu vaccine (no other information known or provided). Patient is on day 15 post vaccination and they are still swollen and hard, she is wondering if there is any data on how long this side effect can last. She made an appointment with her oncologist, she knows that the swollen lymph had the first dose, lymph nodes are still swollen and hard, knows it can cause swollen lymph nodes but wants to know what is the typically length of the event. Patient also experienced other side effects, on 30Dec2020 (last week), she developed vertigo that lasted through the weekend intermittently, states she at first thought she was having a stroke. States it seems to have subsided as of 05Jan2021 (yesterday). Patient also reported she had an itchy rash twice as part of her side effects reported from the COVID 19 vaccine. She noticed an itchy rash and it went away but she is unsure exactly the day or time. Stated she definitely remembered the rash on 28Dec2020 as she took pictures. It was gone in about three hours on the same day. She did not treat the rash because it was gone and not itching. The rash came and went and had not come back. It was mostly on the bends of the arms, bilateral arms. Patient reported developing swollen, tender, and hard lymph nodes under the Left subclavian area the day after the injection, on 24Dec2020. They were not as tender at the time of the report but were continuing and this was 15 days from her vaccination. Patient also experienced an itchy rash bilaterally on her arms that occurred twice and only lasted a few hours each time, onset date reported as 25Dec2020. She was advised to take diphenhydramine hydrochloride (BENADRYL) for it however she did not take it. On 23Dec2020 patient experienced headache. On 24Dec2020 patient experienced extreme fatigue, swollen left subclavian lymph nodes and runny nose. On 30Dec2020 patient experienced joint pain and muscle and vertigo. The events headache, experienced extreme fatigue, swollen left subclavian lymph nodes, runny nose, joint pain and muscle and an itchy rash bilaterally on her arms were considered serious as medically significant events. Patient had not recovered from swollen left subclavian lymph nodes, joint pain and muscle, extreme fatigue and swollen, tender, and hard lymph nodes under the Left subclavian area, she was recovering from headache, runny nose and vertigo and recovered completely from an itchy rash bilaterally on her arms on 28Dec2020.; Sender's Comments: The Causality between the events, headache, experienced extreme fatigue, swollen left subclavian lymph nodes, runny nose, joint pain and muscle and an itchy rash bilaterally on her arms, and the administration of the COVID 19 vaccine cannot be denied based on the reasonable temporal association.   The impact of this report on the benefit/risk profile of the Pfizer product is evaluated as part of Pfizer procedures for safety evaluation, including the review and analysis of aggregate data for adverse events. Any safety concern identified as part of this review, as well as any appropriate action in response, will be promptly notified to RA, IEC, as appropriate.