felt like she has a ball under her armpit; arm, armpit, and down the side of her arm is swollen; arm and shoulder where she got the shot is sore; arm and shoulder where she got the shot is sore; This is a spontaneous report from a contactable consumer (patient herself). A 62-years-old female patient received first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Solution for injection, Lot Number: not reported) via intramuscular, administered in arm right on 16Mar2021 14:00 (at the age of 62-years-old) as dose 1, single for COVID-19 immunization. Medical history included asthma (she was diagnosed a long time ago, probably 20 years ago. She states her asthma is not acting up right now, its seasonal), psoriatic arthropathy (this condition is something that's new, it's only been since last year. She also has psoriasis that goes with it), rheumatoid arthritis (Diagnosed 15-20 years ago), visually impaired (occurred prior to receiving the COVID vaccine) from an unknown date and unknown if ongoing. Investigation Assessment was no. Prior Vaccinations (within 4 weeks) reported as none. Concomitant medications included unspecified drug that suppresses her immune system. On 16Mar2021 the patient experienced arm and shoulder where she got the shot was sore, on 17Mar2021 she felt like she has a ball under her armpit and arm, armpit, and down the side of her arm was swollen. Reporter stated that she was aware about the booklet list with possible side effects. She believes she has one. She got her shot Tuesday, 16Mar2021, late afternoon. That night, her arm and shoulder where she got the shot was sore. Yesterday, it was still pretty painful and then last night, she clarifies she did not notice until she went to bed, it felt like she has a ball under her armpit. Reporter stated she was visually impaired, so she does not use her email a lot. She confirms that the visual impairment occurred prior to receiving the COVID vaccine. She clarifies her arm, armpit, and down the side of her arm was swollen. Basically, she noticed when she laid down, she felt like she had something under her arm or something there where she could not lay on her side. It was like she was laying on something. She mentions she did look at it this morning and it was about the same. She explains she has to get reader out to read her vaccination record card. When probed for Lot number, she explains she sees "534" or "539", but the writing was not extremely legible, and she states it looks like a doctor wrote it. Caller states she does take drugs for psoriatic arthritis and rheumatoid arthritis. No further details provided. She mentions she was just checking and went back and read the side effects and wanted to see if that was what it was and if she should get the second dose. She mentions she takes a drug that suppresses her immune system. She has never had a reaction to a flu shot or vaccination, other than soreness in arm. Caller confirms she has NDC, lot, expiration dates for the flu vaccines where she had a sore arm. She just gets a little soreness, and it goes away, nothing out of ordinary. She mentions she was just checking and went back and read the side effects and thought maybe the swollenness in her, armpit, and down the side could be swollen lymph nodes. She just wanted to see if that is what it is and if she should get the second dose. The event did not require a visit to emergency Room and physician Office. The outcome of the event arm and shoulder where she got the shot is sore and felt like she has a ball under her armpit was unknown and the outcome of the event arm, armpit, and down the side of her arm is swollen was not recovered.  No follow-up attempts are possible; information about lot/batch number cannot be obtained.