Rash in left arm; arm red, a little warm, itchy, raised at inject site. It was about the size of 2, 2.5 quarters. Felt hard under skin. Went away 8-9 days ago. Week later, redness and swelling came back; arm turned red, a little warm, itchy and was raised at the injection site; it was about the size of 2-2.5 quarters; arm turned red, a little warm, itchy and was raised at the injection site; it was about the size of 2-2.5 quarters; arm turned red, a little warm, itchy and was raised at the injection site; it was about the size of 2-2.5 quarters/Covid Arm/Itchy in left arm; arm turned red, a little warm, itchy and was raised at the injection site; it was about the size of 2-2.5 quarters/Covid Arm/Inflammation in left arm; arm turned red, a little warm, itchy and was raised at the injection site; it was about the size of 2-2.5 quarters/Covid Arm/Inflammation in left arm; This is a spontaneous report from a contactable consumer reported for herself. A 50-years-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE; Solution for injection; Lot Number: EL9269; Expiration date was not reported), via intramuscular, administered in Arm Left on 12Feb2021 22:30 as DOSE 1, SINGLE for covid-19 immunisation at Mega-site. Medical history included none. Concomitant medications included ascorbic acid (VIT C); zinc (ZINC) and Dietary supplements taken for an unspecified indication from an unspecified start date and ongoing. The patient experienced arm red, a little warm, itchy, raised at inject site. It was about the size of 2, 2.5 quarters. Felt hard under skin. Went away 8-9 days ago. Week later, redness and swelling came back. The patient was healthy and not typical 50-year-old. Had these symptoms from 15th-18th (Feb), came back after being gone for 4-5days. Now, day 23 and it was back. Itchy, rosy and raised. Read about Covid arm. And it doesn't happen the way it happened to her. Caller says it was public information about Covid arm, so you can talk about it. Caller questioned if it was normal to happen, to go away and to come back. Caller was concerned that it was back. Caller was able to train with swim, bike, run without issues. Caller asked if itching was part of Anaphylaxis and if this was an infection at site would she be feeling bad. She did not want to be the person that had their arm fall off. Stated she knew she was not the only one having itchiness both moderna and Pfizer. Patient was not concern about this but was concerned about what Pfizer was saying (limited information and to be evaluated by an HCP). Calling stated that she volunteered at a mega vaccine site 11 days ago, on 12Feb2021. Because she volunteered there, at the end of the 10-hour day, she received her 1st dose of the vaccine. 2 days after, on 14Feb2021, her arm turned red, a little warm, itchy and was raised at the injection site; it was about the size of 2-2.5 quarters. Then it went away about 8 days ago, on 15Feb2021. Almost a week later, or about 3 days ago, it started to appear again. It was minor but was the same size. Stated that she was an athlete and extremely healthy. She read that if you have a reaction to the vaccine then it means that you have a healthy immune system, which is good. She also read that this "Covid Arm", as she has heard it called, was not very common and it didn't happen in the way that she read. Stated that hers had come and gone, which was not how it was described in what she read, so she just wanted to make sure that it was normal. Stated that she was doing work from home, and she took the day off to be able to take care of this. Prior vaccinations and relevant tests included none. Reporter was very upset about a call she made to Pfizer Medical Information before because the nurses who talked to her did not provided any help or information and stated that Pfizer should provide more information and help about the reactions she was experiencing. Also stated that she was going to write a formal complaint in the news. Additionally, reporter stated she did not experienced anaphylaxis, just the rash, itching and inflammation in the left arm. These reactions did not require any medical intervention or treatment and did not interrupt her daily life activities. The problem was that they "come and go" constantly and are not recovered. Caller declined to complete the report. No further details or clarification provided. Declined to provide any further contact information. Clinical outcome of events was not recovered.  Follow-up attempts are completed. No further information expected.