my lymph node is really swollen/and it hurts; headache/a mild headache; had a little bit of dizziness; sick for a little bit; had a little bit of chills; soreness in my arm; This is a spontaneous report from a contactable other hcp (patient). A 40-year-old female patient received 1st dose of bnt162b2 (Pfizer-Biontech Covid-19 Vaccine, lot number: EH9899), via an unspecified route of administration into the left arm on 19Dec2020 at a single dose for COVID-19 immunization. Medical history included high cholesterol diagnosed in maybe 2016 or 2017, but stated that she has the hereditary type, so she can never get rid of it. Concomitant medication included acetylsalicylic acid (BABY ASPIRIN) for high cholesterol; the patient started taking this last year, but then she stopped for a while because her cholesterol was ok, and then her cholesterol went back up and she started taking this again 3-4 months ago. The patient had the COVID vaccine on Saturday and 20 min in, she had a headache and didn't think much of it, had a little bit of dizziness and they gave her Tylenol and she was fine. She was sick for a little bit and just a mild headache. She had a little bit of chills and soreness in her arm. The next day she woke up and notice her neck, between her shoulder and collar bone and woke up and said 'oh that hurts me' and looked and her lymph node was really swollen. It does not bother her but she took a Tylenol and that seems to help with the swelling and it swells up again after the Tylenol. The caller asked if that was a normal side effect or adverse side effect and should she take the next dose 09Jan2021. She also asked if this is a serious adverse reaction or just a side effect. The patient has an appointment today at the time of report with her doctor. The reporter further added that she is a healthcare worker and she took the COVID vaccine this last Saturday; she received the vaccine in her left arm, and on the left side of her body, where she got the vaccine, she is having a reaction. She was fine right after she got the vaccine, like maybe within 20 minutes of getting it she had a headache a little bit of dizziness, and so she was kept in observation for an hour, but she took some Tylenol and was fine. Then, the next day, the caller woke up and on the left side of her body, she has a lymph node that is swollen, and still has not gone down, and she is wondering if that is normal for the product. She does not really have the headache anymore, but the dizziness is still coming and going, not as bad as it was on that first day, but it comes and goes. She also did have the chills for a bit the day she got the vaccine, but it was just for a few hours and then it went away. The headache she had, was a different type of headache, it was not severe, but it was like a wave where it would come on strong, but not where she couldn't tolerate it, and then the dizziness would come at the same time, and then it would all just go away, and then come back like a wave; caller states that it was weird. The swollen lymph node started the next day, and it hurts. It was pretty swollen when she found it, but she took Tylenol and with the Tylenol, the swelling went down a little bit, but when the Tylenol works its way out of her system, the lymph node swells back up. The patient stated that the lymph node hurts and is painful. The patient does not know the actual dosage amount she received, she just knows it was the first dose in the series. The patient confirms that she did not take any other vaccines on the same day as the COVID vaccine. The patient is due for her second dose of the COVID vaccine next month, and she is wondering if the swollen lymph node would be something that would disqualify her from getting the second dose. Therapeutic measures were taken as a result of headache, dizziness, lymph node is really swollen and it hurts. Outcome of the events headache and chills recovered in Dec2020, for the events dizziness, sick, and soreness in arm was unknown; and for the event node is really swollen/and it hurts was not recovered.