lymph node swelling and lymphedema in the right forearm side and the right upper arm; lymph node swelling and lymphedema in the right forearm side and the right upper arm; cold blister on lip; significant swelling on the right side of the base of her neck near her clavicles; slightly itchy scalp; redness, swelling, tenderness at injection site; redness, swelling, tenderness at injection site; redness, swelling, tenderness at injection site; This is a spontaneous report from a contactable Registered nurse reporting for herself. A 58-years-old female patient received the first dose of BNT162B2 Pfizer-BioNTech COVID-19 Vaccine (Batch/lot number: EL0140), in Hospital, by intramuscular route in right upper arm on 23Dec2020 at 08:30, at 58-year-old of age, at single dose for COVID-19 immunization. The patient had no relevant medical history. She didn't receive any prior vaccinations within 4 weeks. There were no concomitant medications. The patient reported that it has been 2 weeks since she received the COVID-19 Vaccine now and she still has a considerable amount of lymph node swelling and lymphedema in the right forearm side and the right upper arm. The nodes on the right side of her neck around the clavicle have been quite swollen for about 2 weeks. She has the list of side effects so she was not concerned, as this was listed but now she's not sure. When she got the vaccine she had the expected redness, swelling and tenderness at injection site (onset reported as 23Dec2020). On the evening of the 24Dec2020 she had an itchy scalp but she didn't see any rash and that only lasted a short time. On 29Dec2020 the patient had a significant swelling on the right side of the base of her neck near her clavicles that wrapped around to the posterior of her neck and was assessed as medically significant. She treated it by putting ice on it in the evening. On 30Dec2020 the swelling seemed to be slightly decreased but it is still a visible lump, the nodes are firm and there is swelling around those and it has not improved since the 30Dec2020. On 30Dec2020 she noticed a little cold blister or hive on the center of her lower lip and that was resolved by 03Jan2021, she did not have fever and did not feel sick, but her main problem is the swollen lymph nodes around base of neck around clavicle and it is considerably swollen there. The patient reported that last night (06Jan2021) it looked like her right arm was swollen, she thinks she is having lymphedema on the right arm, her right forearm is half an inch circumference larger than her left arm and was measured at her work. The patient reported she is seeing her new primary care doctor on 26Jan2021 and will follow up with the doctor. The patient wanted to know if she should get the second dose scheduled for the next week or should wait until the swelling resolves. Moreover the patient asked how long do the side effects usually last (specifically systemic side effects). The events "redness, swelling and tenderness at injection site" and "slightly itchy scalp" resolved on 25Dec2020, the event "Cold blister on lip" resolved on 03Jan2021. The event "Swelling on the right side of the base of her neck near her clavicles" had not resolved yet at the time of the report.  All the reported events were assessed as related to the COVID-19 Vaccine by the Primary Source Reporter (Method of assessment:Agency).; Sender's Comments: Based on temporal association, the causal relationship between BNT162B2 and the events swelling and lymphadenopathy cannot be excluded. The information available in this report is limited and does not allow a medically meaningful assessment. This case will be reassessed once additional information becomes available. The impact of this report on the benefit/risk profile of the Pfizer product is evaluated as part of Pfizer procedures for safety evaluation, including the review and analysis of aggregate data for adverse events. Any safety concern identified as part of this review, as well as any appropriate action in response, will be promptly notified to Regulatory Authorities, Ethics Committees, and Investigators, as appropriate.