one localized rash described as red with white lump; heart palpitations; Left breast hurt; Red rash; tingling of the left breast; Foggy different feeling; This is a spontaneous report from a contactable consumer (patient). A 73-years-old female patient received first dose of BNT162B2 (Pfizer COVID19, Solution for injection, Lot number EN6201) via an unspecified route of administration in the left arm on 12Feb2021 at 15:00 for Covid-19 immunisation. The patients medical history included Breast cancer, thyroid cancer, blood pressure and palpitations. The patient had allergic to Z-pak. The concomitant medication includes Synthroid 150mcg 1 tablet by mouth once a day for thyroid cancer. Relevant Family medical history included Shingles shot, she took one a long time ago, like 10 years ago, it gave her ringing in the ear. She had no other vaccines on the same day on in the 4 weeks prior to the first dose. On 12Feb2021, the patient experienced Foggy different feeling, on 13Feb2021 at 16:00, tingling of the left breast, on 14Feb2021 experienced Left breast hurt, heart palpitations and localized rash described as red with white lumps. She had no ER visit. The outcome of the event foggy different feeling, left breast hurt, and white lumps was recovered, whereas of red rash and heart palpitations it was recovering and for tingling of the left breast it was recovered with sequelae. The patient underwent lab test which included blood work whose results were unknown and TSH with results 0.57. She wanted to know if those AEs are from the vaccine and if she is ok to get the second shot. She felt lightheaded for 20 minutes, in the left breast is where she had cancer and it was in situ in the duct, it had not spread for which she received 8 weeks of radiation. She went to bed and noticed that her breast was hurting in the night, but she was too tired to get up at that point, when woke up and took a shower she lifted the left breast and saw a massive, bigger than pancake, rash. It was on the bottom of the breast and it ran down to the stomach, it also had white lumps on it, this just frightened her. There was severe redness before, but that has started to fade, it was still dark brown right now, like she can see outline, but it was going away. Before when there was redness, she could press the spot and it would turn white, it would be red again. When read the instruction that came it says there could be a side effect of a rash, but it would be all over the body not localized. She does not know if the vaccine was responsible for it. Then just quickly she started having heart palpitations on Sunday, just a few, but on Monday it was like a 100 of them. She called doctor, at this point that she also has a history of thyroid cancer in 1982, they removed 2/3rds of her thyroid and since then she has been on Synthroid. When her thyroid was not working properly, she had a TSH done. She got lab work done just to see if it was the thyroid. The doctor said it could be from the shot. The Heart Palpitations were fading, she stopped taking Synthroid for 1 day and it went from 100 palpitations to 50, to like 6-7 now. The heart palpitations were going away and that was after stopping the Synthroid for 1 day. The Light headedness only lasted for 20 minutes but started 5 minutes after getting the shot. She clarified that it was not lightheadedness she means to say that she was a little foggy and had a different feeling. The tingling in the Left Breast began, it was for a couple hours, she thought it was different. Normally she doesn't have that. She has had 6 breast operations, so she has very little feeling in that breast normally. Her left breast began to hurt when she was sleeping, she was too tired to get up and look, she rolled over felt something was wrong. This was at 2-3AM on and it subsided when she took shower and patted all around, she dried it and kept an eye on it, the pain started to go away easily. She did notice that she started to feel a little bit of an itch, but that went away quickly too. She had the rash and lumps, it was during the shower she lifted the breast and saw it. She has a picture to provide. It is Not ongoing, it has started to fade, it is still dark reddish brown, but she can tell it was going away. The heart palpitations started late at 4 or 5 in the evening, she has not had that for years. She knows at one-point TSH was high, but they like to keep it low like this in which the 1/3 of thyroid stays dormant, this is intentional because if it gets too high.