egg shaped raised area on the left arm; swelling of left arm; This is a spontaneous report from a contactable consumer. A 75-years-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for Injection, Batch/Lot number: EL3247; Expiration Date: 31May2021) via an unspecified route of administration, administered in Arm Left on 26Jan2021 as DOSE 1, SINGLE (at the age of 75-year-old) for covid-19 immunisation. Medical history included ongoing type 2 diabetes mellitus Diabetic Type 2, drug hypersensitivity (Allergies: can't take penicillin's, antibiotics, sulfa). Concomitant medications included apixaban (ELIQUIS) taken for anticoagulant therapy. On Jan2021, the patient experienced egg shaped raised area on the left arm. On an unspecified date in 2021, patient experienced swelling of left arm. After second shot, patient got both shots in the left arm, patient got this thing that was kind of an egg shaped hard bump on her arm, it was big. After both shots in Mar2021, the left arm also started swelling, it slowly swelled over time. Patient has had 5 different procedures done and they don't know what's wrong with her arm, patient has to learn to live with it. The first 3 doctors patient saw said it has nothing to do with the Pfizer shot. The last doctor that patient saw which was like a vein specialist said that because they don't know enough about the shot, it could be from that. Caller stated that now patient cant get blouses, they have to be tapered on left arm because its so big. They are fitting her for a percussion sleeve and that was all they can do with it. Later in the call caller clarifies it is a compression sleeve not a percussion sleeve, patient misspoke. Patient was pretty sure it has to do with the Pfizer shot. Patient has a lot of allergies to different drugs. Caller stated that since after this happening with the Pfizer shot, Patient would still get the shot even if she knew this was going to happen. Now patient has to buy different clothes. Caller adds that it does pain sometimes because it was heavier than her right arm but it does not pain her, all the time, it's sore. Patient stated that she knows she got it in Mar2021 but on the card it says the first dose as 26Jan2021 and the second dose as 19Feb2021. She went to the hospital to receive the vaccine, she doesn't know why they have the date mixed up. The egg came the day after, the swelling patient didn't notice because it was so slow, patient recall that patient went to family doctor in May2021 and by then it was swelled up, the doctor didn't think it was important. The egg shaped area started at the end of Jan2021. Patient did not know when but it slowly went away. Patient recalls it being hard. Patient knows it was present in May2021 but she doesn't know when it started. It has just gotten bigger over the month, she thinks its stopped growing but it's not going down, it's just the same right now. Caller confirmed vaccine dose dates on her covid card are correct, and she had mistaken it for being sometime in Mar2021. First Dose: Lot EL3247 Expiry 31May2021 Second Dose: Lot EM9810 Expiry 30Jun2021. Investigation: In Jun2021 or Jul2021 she took a test to see if had a blood clots and that was negative. In Jul2021 she had a CT scan of her whole shoulder and it showed nothing. In Aug2021 she went to the vein specialist in which they put liquid in the vein to see if there was a clog and that was negative. All 3 procedures were negative. Treatment: There was nothing she can do about it, she did all the tests and nothing is wrong. The last thing she was fitted for is a compression sleeve, she is being fitted for it now. Caller confirmed in compression and not percussion. She has had to see Physicians, but has not had to go to the emergency Room. Prior to ending the call she asks that she would like to get the booster shot, should she get it in the same arm or in the right. On an unspecified date in 2021, vaccination site mass was resolved and outcome of swelling of left arm was not recovered.