painful, burning lump left breast; Swollen lymph nodes; painful, burning lump left breast/ lot of pain with this lump and some slight burning; This is a spontaneous report from a contactable consumer (patient). A 55-year-old female patient of an unspecified age received second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, formulation: Solution for injection, lot number: EN5318, patient was 54-year-old at the time of vaccination), via an unspecified route of administration in Arm Left on 21Apr2021 at 10:00 as single dose for covid-19 immunisation, as she works in a lab and comes into contact with a lot of things and deals with blood. Medical history included, diagnosed allergies, compromised immune status, respiratory illness, genetic/chromosomal abnormalities, endocrine abnormalities (including diabetes) and obesity. No illness/AE and family Medical History Relevant to AE(s) reported. There were no concomitant medications. Patient did not receive prior Vaccinations within 4 weeks. Historical vaccine included first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, formulation: Solution for injection, lot number: GR8733, patient was 54-year-old at the time of vaccination), via an unspecified route of administration in Arm Left on 31Mar2021 as single dose for covid-19 immunisation. It was reported that patient had done some research that showed it could be a side effect and was wondering if it had been reported. She reports that she had seen her HCP and went yesterday for mammogram, and now they want to biopsy the lump. She was asking if it had been reported as she was trying to weigh it out and see what this was. Reported that patient want to know how Long Side Effects Last, specifically Swollen lymph nodes are likely to had resulted from a robust vaccine-elicited immune response. Referred to HCP for guidance on her symptoms. Emailed attached CONS-what are the risks of the vaccine. Reported that she went to the doctor and found out she had a lump in her left breast. When she got there, they asked her if she had taken the shot, and she said yes. She looked up the side effects and that was one of the side effects, a lump in the breast after taking the shot. The lump is the same size. She was having a lot of pain with this lump and some slight burning. She went to the doctor yesterday, and they did a mammogram and an ultrasound. They couldn't tell exactly what it was, and she had to go and do a biopsy. No additional Vaccines Administered on Same Date of the Pfizer Suspect. The patient experienced painful, burning lump left breast, lot of pain with this lump and some slight burning, swollen lymph nodes on an unspecified date in 2021 and the patient experienced painful, burning lump left breast on 04Jun2021. It was reported that time of Onset (24-hour clock) was about 07:30-08:00. Reporter seriousness for Lump in left breast was unspecified. Patient visited Physician Office for AE(s). No hospitalization was reported. The patient underwent lab tests which included mammogram and ultrasound breast resulted as unknown result, they couldn't tell exactly what it is, Date: 28Jun2021 (Not confirmed). The outcome of event painful, burning lump left breast was not recovered and outcomes of events painful, burning lump left breast/ lot of pain with this lump and some slight burning, swollen lymph nodes was unknown.