swelling in the arm; benign lump on that left side; a lump in that arm; it might be a swollen lymph node; arm was hurting at the injection site; her left arm hurt; This is a spontaneous report from a contactable consumer or other non hcp (Patient).  A 69-year-old female patient received first dose of bnt162b2 (BNT162B2, Solution for injection, Batch/Lot Number: EN6206), via an unspecified route of administration, administered in Arm Left on 08Mar2021 10:00 (Age at vaccination: 68-year-old) as single dose for covid-19 immunization. (Vaccination facility: Public Health Dept). Medical history included thyroid disease, Paroxysmal nocturnal hemoglobinuria both from an unknown date and unknown if ongoing. Concomitant medication included ravulizumab cwvz (ULTOMIRIS [RAVULIZUMAB CWVZ]) taken for an unspecified indication, start and stop date were not reported. patient previously received flu vaccine, pneumonia vaccine, meningitis vaccine. prior vaccinations within four weeks was reported as none. It was reported that She has had the second dose of the vaccine in the left arm as well but in a slightly different area, no date was provided by caller of the second dose. She reports that with the first injection she had swelling in the arm and then ever since then she reports a lump in that arm where the injection was given. She has been to her HCP who was not concerned about the lump and gave her an order for an ultrasound of the area to use if the lump did not go away. She had the ultrasound done on 17Jun2021 and it came back that the lump was benign but she did not get any other information on the teat. The lump is still persisting now. It was reported that "I have had many injections over the year with flu shots and other vaccines like for meningitis and I've never had an issue before. I have scar tissue in other places from surgery but with this there is no scar just the lump". Upon date 16Jul2021 it was reported that She received her first vaccine in the early part of Mar2021 and she noticed some swelling in her left arm. No fever. She did not think much about the swelling. And her left arm hurt. Her doctor did provide a prescription to have an ultrasound if the swelling at the injection site did not go down. The swelling did not go down so last month, Jun2021, she went and had the ultrasound and it came back as a benign lump on that left side. The nurse at the health department mentioned that there have been side effects with lymph nodes but the caller has never had a lump in her arm before. when she takes her shower she does exercises and thats when she noticed the lump and it does hurt sometimes but she able to move her arm. According to the nurse at the health department, Pfizer has noted that some people get swollen lymph nodes. clarified that the lump is in her left arm at the injection site or a little below the injection site. She reports the lump is not round, more like a mass or oval. the past, every year she gets her flu vaccine, the pneumonia vaccine, and has also received the meningitis vaccine and has never gotten a lump or anything like that. She stated with the first Covid 19 vaccine her arm swelled a little, not a lot but it was swollen for about 2 weeks and there was a little pain. She could move her arm but there was pain. She did not notice the lump until after the first Covid 19 vaccine. She been having pain in her left arm off and on. She could be resting and all of a sudden she will have pain. Sometimes the lump in her left arm feels larger than other times. She does not know. It was reported If this is a lymph node what can she do about it. The nurse at the health department said it will go away within 4-6 weeks but hers has been here for months. Maybe she needs to talk to her hematologist to see what he says. Is it because she was not healing or something is preventing the lump from healing. Adverse event not resulted in Emergency Room visit. Patient visited Physician Office for the events. The patient underwent lab tests and procedures which included ultrasound testes: benign on 17Jun2021 She had the ultrasound done on 17Jun2021 and it came back that the lump was benign but she did not get any other information on the teat. The outcome for the event swelling in the arm, it might be a swollen lymph node was reported as unknown and for remaining events outcome was reported as not resolved at the time of this report.     Follow-up attempts are completed. No further information is expected.